added support for local configuration

configs/gvimrc

@@ -13,3 +13,7 @@ else
 	let g:Powerline_symbols = 'fancy'
 	color hybrid
 endif
+
+if filereadable(expand("~/.vim/local.gvimrc"))
+	source ~/.vim/local.gvimrc
+endif

configs/vimrc

@@ -304,3 +304,10 @@ let g:UltiSnipsEditSplit = "horizontal"
 let g:UltiSnipsExpandTrigger = "<tab>"
 let g:UltiSnipsJumpForwardTrigger = "<tab>"
 let g:UltiSnipsJumpBackwardTrigger = "<s-tab>"
+
+" ----------------------------------------------------------------------
+"  Lastly, load configurations available only to this computer
+" ----------------------------------------------------------------------
+if filereadable(expand("~/.vim/local.vim"))
+  source ~/.vim/local.vim
+endif