Add CTRL-P plugin to nvim

nvim/ack

@@ -1,4 +1,12 @@
-let g:ackprg = 'ag --vimgrep --smart-case' " Use the_silver_searcher for Ack
+if executable('ag')
+  let g:ackprg = 'ag --vimgrep --smart-case' " Use the_silver_searcher for Ack
 
-noremap \ :Ack<Space>
-noremap <Leader>\ :Ack <C-r><C-w><CR>
+  noremap \ :Ack<Space>
+  noremap <Leader>\ :Ack <C-r><C-w><CR>
+
+  " Use Ag over Grep
+  set grepprg=ag\ --nogroup\ --nocolor
+
+  " Use ag in CtrlP for listing files. Lightning fast and respects .gitignore
+  let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
+endif