vim: Replace ag.vim with ack.vim/QFEnter

* ag.vim is now deprecated
* QFEnter is used to avoid mileszs/ack.vim#170

vim/plug-setup.vim

@@ -23,14 +23,15 @@ Plug 'junegunn/vim-easy-align', { 'on': ['<Plug>(EasyAlign)', 'EasyAlign'] }
 Plug 'itchyny/lightline.vim'
 Plug 'itspriddle/ZoomWin'
 Plug 'milkypostman/vim-togglelist'
+Plug 'yssl/QFEnter'
 
 " Colors
 Plug 'altercation/vim-colors-solarized'
 
 " File browsing/search
 Plug 'jeetsukumaran/vim-filebeagle'
 Plug 'ctrlpvim/ctrlp.vim'
-Plug 'rking/ag.vim'
+Plug 'mileszs/ack.vim'
 Plug 'bogado/file-line'
 
 " Ruby

vimrc

@@ -174,14 +174,17 @@ vnoremap <C-@> I<space><esc>gv
 
 " Plugin Settings/Filetype maps {{{
 
-" ag.vim {{{
+" ack.vim {{{
 
-noremap <leader>f :Ag!<space>
+noremap <leader>f :Ack!<space>
 
 if executable("ag")
-  let g:ag_prg = "ag --vimgrep"
+  let g:ackprg = "ag --vimgrep"
 endif
 
+let g:ack_apply_qmappings = 0
+let g:ack_apply_lmappings = 0
+
 " }}}
 
 " Buffers (performed on every buffer) {{{
@@ -361,6 +364,16 @@ augroup ft_quickfix
     \ endif
 augroup END
 
+" QFEnter.vim {{{
+
+let g:qfenter_open_map            = ['<CR>', 'o']
+let g:qfenter_vopen_map           = ['v']
+let g:qfenter_hopen_map           = ['h']
+let g:qfenter_topen_map           = ['t']
+let g:qfenter_enable_autoquickfix = 0
+
+" }}}
+
 " }}}
 
 " rails.vim {{{