Adding a test around my vim mouse settings to see if it is available

vimrc

@@ -50,8 +50,10 @@ Bundle 'bitc/vim-hdevtools'
 filetype plugin indent on " last Vundle requirement
 
 " mouse
+if has("mouse")
     set mouse=a
     set ttymouse=xterm
+endif
 
 " general goodness
 set shell=/bin/bash " Syntastic breaks when trying to write to /var/folders