add ackmore vim plugin for visual range ack and remove our own shortcuts

There is a problem: Ack's 'q' shortcut overrides Ackmore's, and Ack's shortcut
only closes quickfix windows, whereas Ackmore closes both quickfix and location
lists. Also, Ackmore's default settings are to open in location lists, making us
lose the quick close function. How can we remedy this?

.gitmodules

@@ -31,3 +31,6 @@
 [submodule "vim/bundle/fugitive"]
 	path = vim/bundle/fugitive
 	url = git://github.com/tpope/vim-fugitive.git
+[submodule "vim/bundle/ackmore"]
+	path = vim/bundle/ackmore
+	url = https://github.com/jordansissel/vim-ackmore.git

vim/bundle/ackmore

@@ -0,0 +1 @@
+Subproject commit 62c6f93f5fec2da9ae86a6d3f821640ba2edbf9e

vim/vimrc

@@ -56,7 +56,6 @@ if has("autocmd")
  
     " if the last window is NERDTree, then close Vim
     "autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTreeType") && b:NERDTreeType == "primary") | q | endif 
- 
 else
     set autoindent on
 endif
@@ -186,12 +185,6 @@ vnoremap <silent> <leader>,    <ESC>:call NERDComment("x", "toggle")<CR>
 " Traverse undo tree with Gundo!
 nnoremap <leader>u :GundoToggle<CR>
 
-" Search under cursor with ack!
-nnoremap <leader>a :Ack <cword><CR>
-nnoremap <leader>A :Ack -a <cword><CR>
-vnoremap <leader>a :Ack <cword><CR>
-vnoremap <leader>A :Ack -a <cword><CR>
-
 
 """"""""
 "" Key Remaps - Movement and Windows