Add aspect-fit/aspect-fil/stretch content mode types for bgimages
Add aspect-fit/aspect-fil/stretch content mode types for bgimages

dreemproject/dreemgl,dreemproject/dreemgl,dreemproject/dreemgl,teem2/dreemgl,dreemproject/dreemgl,teem2/dreemgl,teem2/dreemgl,teem2/dreemgl,dreemproject/dreemgl,teem2/dreemgl