diff --git a/website/static/archives/0.1.0/versionswitcher.sh b/website/static/archives/0.1.0/versionswitcher.sh
deleted file mode 100644
index fbb267b..0000000
--- a/website/static/archives/0.1.0/versionswitcher.sh
+++ /dev/null
@@ -1,182 +0,0 @@
-###
-### $Release: 0.1.0 $
-### $Copyright: copyright(c) 2011 kuwata-lab.com all rights reserved $
-### $License: Public Domain $
-###
-
-###
-### versionswitcher.sh -- switch version of language or application
-###
-### setup:
-###   $ VERSIONSWITCHER_PATH=$HOME/lang
-###   $ . /some/where/to/versionswitcher.sh'
-###   $ vs --help
-###
-
-
-###
-[ -z "$VERSIONSWITCHER_PATH" -a -d $HOME/lang ] && VERSIONSWITCHER_PATH=$HOME/lang
-
-
-###
-versionswitcher() {
-    local lang=$1
-    local version=$2
-    local release=`echo '$Release: 0.1.0 $' | awk '{print $2}'`
-    case $lang in
-    -h|--help)
-        cat <<END
-versionswitcher - change version of language or application
-release: $release
-examples:
-    $ VERSIONSWITCHER_PATH=\$HOME/lang
-    $ vs -h             # show help
-    $ vs python 2.6.6   # use \$HOME/lang/python/2.6.6
-    $ vs python 2       # use \$HOME/lang/python/2.x.x (ex. 2.7.1)
-    $ vs python latest  # use latest version under \$HOME/lang/python
-    $ vs python -       # use system-installed one (ex. /usr/bin/python)
-    $ vs python         # show installed versions of python
-    $ vs                # show installed languages
-
-tips:
-    * Short name 'vs' is an alias to 'versionswitcher'.
-    * It is allowed to set VERSIONSWITCHER_PATH=path1:path2:path3:...
-    * \$HOME/.versionswitcher/hooks/<language>.sh is imported if exists.
-END
-        ;;
-    -v|--version)
-        echo $release
-        ;;
-    ruby|rb)       __vs_switch ruby      ruby     "$version";;
-    python|py)     __vs_switch python    python   "$version";;
-    perl)          __vs_switch perl      perl     "$version";;
-    rubinius|rbx)  __vs_switch rubinius  rbx      "$version";;
-    gauche|gosh)   __vs_switch gauche    gosh     "$version";;
-    *)             __vs_switch $lang     $lang    "$version";;
-    esac
-}
-
-
-###
-__vs_glob() {
-    local pattern=$1
-    local filenames
-    if [ -n "$BASH_VERSIONK" ]; then           # for bash
-        (shopt -s nullglob; echo $pattern)
-    elif [ -n "$ZSH_VERSION" ]; then           # for zsh
-        (setopt nonomatch; setopt nullglob; eval echo $pattern)
-    else                                       # other
-        filenames=`echo $pattern`
-        [ "$filenames" == "$pattern" ] || echo $filenames
-    fi
-}
-
-###
-__vs_switch() {
-    local lang=$1
-    local command=$2
-    local version=$3
-    ## exit if $VERSIONSWITCHER_PATH is not set
-    if [ -z "$VERSIONSWITCHER_PATH" ]; then
-        echo 'versionswitcher: $VERSIONSWITCHER_PATH is not set.' 2>&1
-        return 1
-    fi
-    ## show all language names if lang is not specified
-    local dir
-    local basedir
-    local list
-    if [ -z "$lang" ]; then
-        #echo "## language          # basedir"
-        echo "## installed"
-        for dir in `echo $VERSIONSWITCHER_PATH | tr ':' ' '`; do
-            for basedir in `__vs_glob "$dir/*"`; do
-                list=`__vs_glob "$basedir/*/bin"`
-                if [ -n "$list" ]; then
-                    lang=`basename $basedir`
-                    printf "%-20s # %s\n" $lang $basedir
-                fi
-            done
-        done | sort
-        return 0
-    fi
-    ## check whether installed or not
-    local basedir=''
-    for dir in `echo $VERSIONSWITCHER_PATH | tr ':' ' '`; do
-        if [ -n "$dir" -a -d "$dir/$lang" ]; then
-            basedir="$dir/$lang"
-            break
-        fi
-    done
-    if [ -z "$basedir" ]; then
-        echo "versionswitcher: $lang is not installed." 2>&1
-        return 1
-    fi
-    ## list available versions if version is not specified
-    local ver
-    if [ -z "$version" ]; then
-        echo "## basedir: $basedir"
-        echo "## versions:"
-        for dir in `__vs_glob "$basedir/*/bin"`; do
-            basename `dirname $dir`
-        done
-        return 0
-    fi
-    ## find 'bin' directory
-    local bindir
-    if [ "$version" = "-" ]; then
-        bindir=""
-    elif [ "$version" = "latest" ]; then
-        bindir=`__vs_glob "$basedir/*/bin"`
-    else
-        bindir="$basedir/$version/bin"
-        if ! [ -d "$bindir" ]; then
-            bindir=`__vs_glob "$basedir/$version*/bin" | awk '{print $NF}'`
-        fi
-    fi
-    if [ -z "$bindir" -a "$version" != "-" ]; then
-        echo "versionswitcher: $lang version $version is not installed." 2>&1
-        return 1
-    fi
-    ## remove current bindir from $PATH
-    #local newpath=`ruby -e "print ENV['PATH'].split(':').delete_if{|x|x=~%r'^$basedir/.*/bin'}.join(':')"`
-    local newpath=$bindir
-    for dir in `echo $PATH | tr ':' ' '`; do
-        case $dir in
-        $basedir/*/bin*)
-            ;;
-        *)
-            if [ -z "$newpath" ]; then
-                newpath=$dir
-            else
-                newpath=$newpath:$dir
-            fi
-            ;;
-        esac
-    done
-    ## set $PATH
-    local prompt='$'  # or '[versionswitcher]$'
-    echo "$prompt export PATH=$newpath"     ; export PATH=$newpath
-    hash -r
-    ## set or clear ${lang}root
-    local rootvar="${lang}root"
-    #local vervar=`awk 'BEGIN{print toupper("VERSIONSWITCHER_'$lang'_VERSION")}'`
-    local vervar="${lang}version"
-    if [ -n "$bindir" ]; then
-        rootdir=`dirname $bindir`
-        version=`basename $rootdir`
-        echo "$prompt $rootvar='$rootdir'" ; eval "$rootvar=$rootdir"
-        echo "$prompt $vervar='$version'"  ; eval "$vervar='$version'"
-    else
-        echo "$prompt unset $rootvar"      ; unset $rootvar
-        echo "$prompt unset $vervar"       ; unset $vervar
-    fi
-    ## show command path
-    echo "$prompt which $command"          ; which $command
-    ## import hook script if exists
-    local script="$HOME/.versionswitcher/hooks/$lang.sh"
-    [ -f "$script" ] && . $script
-}
-
-
-###
-alias vs=versionswitcher
diff --git a/website/static/archives/0.1.1/versionswitcher.sh b/website/static/archives/0.1.1/versionswitcher.sh
deleted file mode 100644
index ffaac4c..0000000
--- a/website/static/archives/0.1.1/versionswitcher.sh
+++ /dev/null
@@ -1,182 +0,0 @@
-###
-### $Release: 0.1.1 $
-### $Copyright: copyright(c) 2011 kuwata-lab.com all rights reserved $
-### $License: Public Domain $
-###
-
-###
-### versionswitcher.sh -- switch version of language or application
-###
-### setup:
-###   $ VERSIONSWITCHER_PATH=$HOME/lang
-###   $ . /some/where/to/versionswitcher.sh'
-###   $ vs --help
-###
-
-
-###
-[ -z "$VERSIONSWITCHER_PATH" -a -d $HOME/lang ] && VERSIONSWITCHER_PATH=$HOME/lang
-
-
-###
-versionswitcher() {
-    local lang=$1
-    local version=$2
-    local release=`echo '$Release: 0.1.1 $' | awk '{print $2}'`
-    case $lang in
-    -h|--help)
-        cat <<END
-versionswitcher - change version of language or application
-release: $release
-examples:
-    $ VERSIONSWITCHER_PATH=\$HOME/lang
-    $ vs -h             # show help
-    $ vs python 2.6.6   # use \$HOME/lang/python/2.6.6
-    $ vs python 2       # use \$HOME/lang/python/2.x.x (ex. 2.7.1)
-    $ vs python latest  # use latest version under \$HOME/lang/python
-    $ vs python -       # use system-installed one (ex. /usr/bin/python)
-    $ vs python         # show installed versions of python
-    $ vs                # show installed languages
-
-tips:
-    * Short name 'vs' is an alias to 'versionswitcher'.
-    * It is allowed to set VERSIONSWITCHER_PATH=path1:path2:path3:...
-    * \$HOME/.versionswitcher/hooks/<language>.sh is imported if exists.
-END
-        ;;
-    -v|--version)
-        echo $release
-        ;;
-    ruby|rb)       __vs_switch ruby      ruby     "$version";;
-    python|py)     __vs_switch python    python   "$version";;
-    perl)          __vs_switch perl      perl     "$version";;
-    rubinius|rbx)  __vs_switch rubinius  rbx      "$version";;
-    gauche|gosh)   __vs_switch gauche    gosh     "$version";;
-    *)             __vs_switch $lang     $lang    "$version";;
-    esac
-}
-
-
-###
-__vs_glob() {
-    local pattern=$1
-    local filenames
-    if [ -n "$BASH_VERSION" ]; then            # for bash
-        (shopt -s nullglob; echo $pattern)
-    elif [ -n "$ZSH_VERSION" ]; then           # for zsh
-        (setopt nonomatch; setopt nullglob; eval echo $pattern)
-    else                                       # other
-        filenames=`echo $pattern`
-        [ "$filenames" == "$pattern" ] || echo $filenames
-    fi
-}
-
-###
-__vs_switch() {
-    local lang=$1
-    local command=$2
-    local version=$3
-    ## exit if $VERSIONSWITCHER_PATH is not set
-    if [ -z "$VERSIONSWITCHER_PATH" ]; then
-        echo 'versionswitcher: $VERSIONSWITCHER_PATH is not set.' 2>&1
-        return 1
-    fi
-    ## show all language names if lang is not specified
-    local dir
-    local basedir
-    local list
-    if [ -z "$lang" ]; then
-        #echo "## language          # basedir"
-        echo "## installed"
-        for dir in `echo $VERSIONSWITCHER_PATH | tr ':' ' '`; do
-            for basedir in `__vs_glob "$dir/*"`; do
-                list=`__vs_glob "$basedir/*/bin"`
-                if [ -n "$list" ]; then
-                    lang=`basename $basedir`
-                    printf "%-20s # %s\n" $lang $basedir
-                fi
-            done
-        done | sort
-        return 0
-    fi
-    ## check whether installed or not
-    local basedir=''
-    for dir in `echo $VERSIONSWITCHER_PATH | tr ':' ' '`; do
-        if [ -n "$dir" -a -d "$dir/$lang" ]; then
-            basedir="$dir/$lang"
-            break
-        fi
-    done
-    if [ -z "$basedir" ]; then
-        echo "versionswitcher: $lang is not installed." 2>&1
-        return 1
-    fi
-    ## list available versions if version is not specified
-    local ver
-    if [ -z "$version" ]; then
-        echo "## basedir: $basedir"
-        echo "## versions:"
-        for dir in `__vs_glob "$basedir/*/bin"`; do
-            basename `dirname $dir`
-        done
-        return 0
-    fi
-    ## find 'bin' directory
-    local bindir
-    if [ "$version" = "-" ]; then
-        bindir=""
-    elif [ "$version" = "latest" ]; then
-        bindir=`__vs_glob "$basedir/*/bin"`
-    else
-        bindir="$basedir/$version/bin"
-        if ! [ -d "$bindir" ]; then
-            bindir=`__vs_glob "$basedir/$version*/bin" | awk '{print $NF}'`
-        fi
-    fi
-    if [ -z "$bindir" -a "$version" != "-" ]; then
-        echo "versionswitcher: $lang version $version is not installed." 2>&1
-        return 1
-    fi
-    ## remove current bindir from $PATH
-    #local newpath=`ruby -e "print ENV['PATH'].split(':').delete_if{|x|x=~%r'^$basedir/.*/bin'}.join(':')"`
-    local newpath=$bindir
-    for dir in `echo $PATH | tr ':' ' '`; do
-        case $dir in
-        $basedir/*/bin*)
-            ;;
-        *)
-            if [ -z "$newpath" ]; then
-                newpath=$dir
-            else
-                newpath=$newpath:$dir
-            fi
-            ;;
-        esac
-    done
-    ## set $PATH
-    local prompt='$'  # or '[versionswitcher]$'
-    echo "$prompt export PATH=$newpath"     ; export PATH=$newpath
-    hash -r
-    ## set or clear ${lang}root
-    local rootvar="${lang}root"
-    #local vervar=`awk 'BEGIN{print toupper("VERSIONSWITCHER_'$lang'_VERSION")}'`
-    local vervar="${lang}version"
-    if [ -n "$bindir" ]; then
-        rootdir=`dirname $bindir`
-        version=`basename $rootdir`
-        echo "$prompt $rootvar='$rootdir'" ; eval "$rootvar=$rootdir"
-        echo "$prompt $vervar='$version'"  ; eval "$vervar='$version'"
-    else
-        echo "$prompt unset $rootvar"      ; unset $rootvar
-        echo "$prompt unset $vervar"       ; unset $vervar
-    fi
-    ## show command path
-    echo "$prompt which $command"          ; which $command
-    ## import hook script if exists
-    local script="$HOME/.versionswitcher/hooks/$lang.sh"
-    [ -f "$script" ] && . $script
-}
-
-
-###
-alias vs=versionswitcher