Email: Slim goes TRDS

cheers
Add action buttons to new email notifications

Another new feature from Slim!

Works similar to Gmail in that single messages have action buttons.
Each action can be toggled on/off, allowing you to revert back to stock functionality.

Buttons: Mark read, Reply, Delete

Screenshot: https://dl.dropboxusercontent.com/u/2094658/d2att/email_notification_buttons.png

ps4: Fixed intents

Change-Id: Ifa23298d859dc045d943b386b106a8aee76ec2c6

Conflicts:
	res/values/strings.xml
Merge branch 'DerTeufel/cm-10.2'