vimrc: replace ctrlp with unite

vimrc

@@ -23,10 +23,13 @@ NeoBundle 'Shougo/vimproc.vim' , {
       \   },
       \ }
 
+NeoBundle 'Shougo/unite.vim'
+NeoBundle 'tsukkee/unite-tag'
+NeoBundle 'Shougo/neomru.vim'
+
 NeoBundle 'nanotech/jellybeans.vim'
 NeoBundle 'majutsushi/tagbar'
 NeoBundle 'bling/vim-airline'
-NeoBundle 'kien/ctrlp.vim'
 NeoBundle 'scrooloose/syntastic'
 NeoBundle 'tomtom/tcomment_vim'
 "NeoBundle 'Raimondi/delimitMate'
@@ -99,3 +102,29 @@ if &term == "screen" || &term == "screen-bce"
   set t_fs=\
 endif
 set title
+
+" unite bindings
+if executable('ag')
+  let g:unite_source_grep_command = 'ag'
+  let g:unite_source_grep_default_opts = '--noheading --nocolor'
+endif
+" The prefix key
+nnoremap [unite] <Nop>
+nmap <space> [unite]
+" General purpose
+nnoremap [unite]<space> :Unite -start-insert source<cr>
+" Files
+nnoremap [unite]f :Unite -start-insert file_rec/async<cr>
+" Grepping
+nnoremap [unite]g :Unite grep:.<cr>
+nnoremap [unite]d :Unite grep:.:-s:\(TODO\|FIXME\)<cr>
+" Content
+nnoremap [unite]o :Unite -start-insert -auto-preview outline<cr>
+nnoremap [unite]l :Unite -start-insert line<cr>
+nnoremap [unite]t :Unite -auto-preview -start-insert tag<cr>
+" Quickly switch between recent things
+nnoremap [unite]F :Unite buffer tab file_mru directory_mru<cr>
+nnoremap [unite]b :Unite buffer<cr>
+nnoremap [unite]m :Unite file_mru<cr>
+" Yank history
+nnoremap [unite]y :Unite history/yank<cr>