Resolve 'collision.com.badlogic.gdx.physics.bullet.collision' issue
Added a VirtualViewport to help with keeping the aspect ratio and
handling a fixed viewport.
Getter for canvas element
Merge remote-tracking branch 'upstream/master'
Added listener which runs method beforeSetup before setup of the canvas
and afterSetup after creation of the canvas
Added viewports with tests.
Removed the old VirtualViewport utility.
Expand some of the documentation
Make isMotorEnabled() public
Merge pull request #1480 from lioncash/documentation

Expand some of the documentation
Source formatted.
MipMap, filtering, texture format support for 3D model loaders
InputListener touchDragged and touchUp now return boolean.

Sorry for the breakage. In most cases you return true from touchDown and always want touchDragged and touchUp to be handled, but sometimes you don't, such as ClickListener.
closes #1481
Mark some utility classes as final.
This makes sense, considering all that is provided is utility methods.
Merge pull request #1486 from lioncash/util-final

Mark some utility classes as final.
Going back to touchDragged/Up always being handled.

#1481
Merge branch 'origin/master'
Make the emulated utils classes in the gwt backend final as well.
Clarify quaternion getAxisAngle
Merge pull request #1488 from xoppa/various

Clarify quaternion getAxisAngle