Create .lesskey and compile it on setup

ref. http://unix.stackexchange.com/questions/59188/how-to-set-up-hjkl-for-less
Use diff-highlight for git

ref. http://motemen.hatenablog.com/entries/2013/11/26
Modify diff-highlight for multi bytes characters

ref. http://d.hatena.ne.jp/sugyan/20140207/1391771341