Install script

$> cd ~
$> sh install/install.sh

It will do following things:
    1. Backup original rc files to $HOME/.oldrc(mkdir if not exists).
    2. Making new rc files to "$HOME/" .
    3. These new rc files are just doing by-pass refernce.
        for example $HOME/.bashrc, only one line code in it:
            source $HOME/env/bashrc

What are inside?

"vim folder" provides my favorite "jellybean.vim" theme
"vimrc" set following things:
	1. normalize the indent-tab (shiftwidth, tabstop, softtabstop, expandtab, ai)
    2. encoding utf-8
    3. turn on syntax

"bashrc" set following things:
    1. set prompt like "ot32em@myhost [~]$ " with colorized format
    2. set env variable TERM to "256color" for supporting jellybean 256 color theme.
    3. add some common short cut alias like la = ls -a, ll = ls -l, etc.

"tmux.conf" set following things:
    1. ctrl-a is ergonomic violation prefix function key, changed to ctrl-b
    2. map "-" to split panes horizontally and "|" to split vertically
    3. map vim-like style move window by h, j, k, and l