Add readme and initial scripts.

README.mdown

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+Shell Scripts
+=============
+This repository contains of a collection of simple and small, but very useful
+shell scripts that I often use personally.
+
+* base64decode: decode BASE64 strings received from stdin.
+* base64encode: encode plain strings into BASE64 from stdin.
+* git-can-ff: determines if the current branch can fast-forward (ff) to its
+              remote counterpart.
+* quote: quotes each line from stdin to stdout. Very useful when piping
+         filenames with spaces into xargs.
+* sedfiles.sh: batch change file names using a sed expression.

base64decode

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+#!/usr/bin/php
+<?php print base64_decode(file_get_contents('php://stdin')) ?>

base64encode

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+#!/usr/bin/php
+<?php print base64_encode(file_get_contents('php://stdin')) ?>

git-can-ff

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+#!/bin/sh
+usage() {
+    echo "usage: $(basename $0) <from-ref> <to-ref>" >&2
+    exit 2
+}
+
+[ $# -ne 2 ] && usage
+
+FROM_REF=$1
+TO_REF=$2
+
+FROM_HASH=$(git show-ref --hash $FROM_REF)
+TO_HASH=$(git show-ref --hash $FROM_REF)
+BASE_HASH=$(git merge-base $FROM_REF $TO_REF)
+
+if [ "$BASE_HASH" = "$FROM_HASH" -o \
+     "$BASE_HASH" = "$FROM_REF" ]; then
+    exit 0
+else
+    exit 1
+fi

quote

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+#!/bin/sh
+sed -E 's/^(.*)$/"&"/g'

sedfiles.sh

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+#!/bin/bash
+
+if test -z "$*"; then
+	echo "No files to parse"
+	exit
+fi
+
+SEARCH="contextStackSize"
+REPLACE="actualStackSize"
+
+echo "Searching for $SEARCH"
+echo "Replacing with $REPLACE"
+
+for afile in $*; do
+	DATA=`grep "$SEARCH" $afile`
+
+	if test -n "$DATA"; then
+
+		echo "Processing $afile ..."
+
+		rm -f $afile.backup
+		rm -f $afile.backup2
+
+		cp $afile $afile.backup
+
+		COMMAND="s/$SEARCH/$REPLACE/g"
+		echo "`cat $afile.backup | sed -e $COMMAND`" > $afile
+
+		if grep "$SEARCH" $afile; then
+			echo "Ops.. maybe it didn't work..."
+		else
+			echo "Ok, it worked."
+		fi
+	fi
+
+done