Fix async loading of ETC1
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

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Merge pull request #1060 from niyaro/fixasync

Bug-fix: AssetManager loads ETC1 textures synchronously