fix set animateUVs error in CompiledPass.as
fix for issue #588
add support for the new atf format, fix for issue #608
fix bug: mesh whose texture has no mipmap and alphaThreshold>0 cannot cast shadow
Multi view background fix. Issue 611
Correct incorrect 2PI calc. Closes #648
resolve undefined bug on iPad 1. Closes #646 and #425
misc fixes to segmentset. Closes #610
Merge pull request #615 from daiwei1999/dev

Fix some issues
Merge branch 'dev'
Merge pull request #622 from JohnBrookes/BackgroundBug611

Background bug611
optimisation to the MD2 parser. Closes #631
fix to rotate yaw pitch roll for scaled 3D objects. Closes #626
bugfix on filter method for custom filterFunc. Closes #619
fix for picking when null material encountered
updating of MAX_SIZE const for textures to 4096. Closes #647
Merge branch 'dev'
fix to awd1 parser
refix to pitch/roll/yaw
updated changelog and bumped revision number to 4.1.5