add pathogen.vim
add autoload for pathogen.vim
add YouCompleteMe
add YCM configuration to vimrc

set complete request timeout to 3 seconds.
enable collect_identifiers_from_comments_and_strings.
add ctrlp.vim
add vim-airline
add vim-airline configuration to vimrc
enable BCE in .tmux.conf

in order to get transparent background in vim
set vim colorscheme as molokai

and remove the bg color (keep it transparent).
turn on vim's swapfile and writebackup
add tmx

see https://github.com/mdengler/tmux-extra.git
adjust ctrlp settings in vimrc

show hidden files and use buffer mode in default
update vim plugins

YCM and airline
add undotree (vim plugin)
fix default-terminal setting in .tmux.conf

`-s' mess up the terminal title bar
setup undotree and persistent-undo for vim
add nerdtree (vim plugin)
add easymotion (vim plugin)
add tagbar (vim plugin)
add nerdcommenter (vim plugin)