open commit at github on tig

see http://blog.kyanny.me/entry/2012/07/22/033134
--no-ri --no-rdoc Deprecated Options, Use --no-document instead
Update .gitconfig

see https://speakerdeck.com/uasi/git-raihuwokuai-shi-nisuruzhi-rarezarukomandotati
Add .tigrc
Update .zprofile .zshenv .zshrc