add `'EasyGrepRecursive'` option

When we use `ack` in easygrep, it errors with a 'No Matches' warning if the root
search directory contains only folders. The `'EasyGrepRecursive'` option has to
be specified to overcome this.

vim/vimrc

@@ -315,6 +315,7 @@ let g:EasyGrepCommand = 1 " don't use the built in vimgrep, which is slow
 " Caveat about using ack: cannot search unsaved changes in buffer, unlike vimgrep
 let g:EasyGrepJumpToMatch = 0
 let g:EasyGrepHighlightQfMatches = 1
+let g:EasyGrepRecursive = 1 " always start trying to recurse through directories
 
 
 """"""""" Indent Guides