Updates tridactylrc and adds gnvim script

The script simply opens a new terminal with nvim running in it, passing
any arguments directly to nvim

This is used by tridactyl to open a text box in vim

Also added some new search engines and some other keybindings

bin/.bin/gnvim

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+export initialCommand="nvim $@"
+/usr/local/bin/st