Added device_profile variable, possible values and link to it in Zencoder API docs.

Also added trims around a couple len checks.
Fixed len(trim()) call on line 133. Parenthesis was in wrong place.
Merge branch 'master' of https://github.com/mikesprague/zencoder-cf into
pullrequest

Conflicts:
	zencoder/ZencoderOutput.cfc