BIG CHANGE FOR VIM !!!

    1. update gmarik/vundle to commit 6545681
    2. change 'Bundle' to 'Plugin'
    3. change the origin of some plugins, especially those from
       vim-script sitek, to github
    4. use some new plugins insead of old ones, for example:
            a) use YouCompleteMe instead of neocomplcache series.
            b) use emmet-vim instead of ZenCoding.vim for html/css.
            c) use vim-airline instead of powerline (powerline-fonts
               stays).
            d) add vim-rails
            e) remote argtextobj, bash-support.vim, command-t,
               nerdtree-ack, The-NERT-tree, sparkup,
    5. upgrade all used plugins to the latest version.