added vim-ack

vimrc

@@ -200,6 +200,8 @@ Bundle 'bling/vim-airline'
 let g:airline#extensions#tabline#enabled = 1
 let g:airline_left_sep = ''
 let g:airline_right_sep = ''
+let g:airline#extensions#tabline#fnamecollapse = 0
+let g:airline_exclude_preview=1
 Bundle 'goldfeld/vim-seek'
 let g:seek_subst_disable = 1
 let g:seek_enable_jumps = 1
@@ -212,4 +214,5 @@ Bundle 'airblade/vim-gitgutter'
 let g:gitgutter_enabled = 0
 noremap <silent><leader>g :GitGutterToggle<Cr>
 Bundle 'ivyl/vim-bling'
+Bundle 'mileszs/ack.vim'
 "" }}}