Testing out helm, updated projectile to get projectile-helm integration

Conflicts:
	.gitmodules
	init.el
Use helm v1.6.4, async v1.2. Update README.

Conflicts:
	README.md
Woops - add init-helm.el
Helm projectile
Few more changes to helm config
Projectile: enable caching, less mode-line clutter
Next/previous error/grep hit hotkeys
Better mark current word hotkey