Improve some keymaps, instead of overriding standard keys.

Added many convenience mappings for LustyJuggler such as
,lm for rails models, ,lc for controllers, etc

vim/plugin/settings/NERDtree-tabs.vim

@@ -0,0 +1,5 @@
+" Auto open nerd tree on startup
+let g:nerdtree_tabs_open_on_gui_startup = 1
+" Focus in the main content window
+let g:nerdtree_tabs_focus_on_files = 1
+