[add] use mouse in vim
[add] add alias for ruby and python in zshrc
[add] git alias 'sb' for show-branch
[add] zsh alias 'greptab'
[change] vim highlight for serch and visual mode
[add] add two vim plugins

Add two vim plugins installed by NeoBundle for clang-format.
  * vim-operator-user
  * vim-clang-format
Merge branch 'master' of https://github.com/ordovicia/dotfiles