Fix async loading of ETC1
Experimental: Remove Android PowerManager Wakelock dependence 

Helps clean up the deprecation of some of the methods used in the Android backend.
Other notes:
- No longer requires a special permission
- Platform now manages wakelock
- Google recommends using this instead of the previous method
Experimental: Remove Deprecated Wakelock Refrences from AndroidApplicationConfiguration

We use a new method now instead of PowerManager
clarify Select.java doc
Merge pull request #1080 from jrenner/select-doc

clarify Select.java doc
added Javadoc for Predicate.evaluate()
Merge pull request #1081 from jrenner/predicate-doc

added Javadoc for Predicate.evaluate()
Added rotate90.
rectLine with Vector2s.
Merge branch 'origin/master'
changes
Add null check
Correct imports

Never ever use the edit button on GitHub. Ever.
Merge pull request #1060 from niyaro/fixasync

Bug-fix: AssetManager loads ETC1 textures synchronously
Merge remote-tracking branch 'origin/master' into experimental-changes
Experimental: Update changes for wakelock changes
Merge pull request #1079 from Unkn0wn0ne/experimental-changes

Removed deprecated wakelock dependence from Android backend