Add some cool mappings to xvimrc
New vimgrep/grep bindings
YAY! Add new breakindent and breakindentopt settings.

- Requires > vim 7.4.340. No if statement to check this because I don't
  care.

(cherry picked from commit 4a0e5b4cfc87c5a70c643587b468a80641de3c0c)

Conflicts:
	.vimrc