[clear] indent .gitonfig

Indent .gitonfig
[remove] remove GNUTERM setting in .zshrc

Remove `export GNUTERM=aqua` in .zshrc because it should be configured
only in .zshrc_osx
[add] add some plugins

add some plugins;
sudo.vim, vimproc, vimshell, ruby-related plugins, haskell-related plugins.
[add] add initializing pyenv

add `eval "$(pyenv init -)" in .zshrc_osx to initialize pyenv