Math fixes and additions:
quaternion setFromAxes function fixed
Vector3 mul with Matrix3 function added
Matrix3 added function setFromAxis
Refix quaternion setFromAxes
added fast normalization to vectors classes
added fast inv sqrt to MathUtils
added FastMathTest class
Resolve 'collision.com.badlogic.gdx.physics.bullet.collision' issue
Added possibility to override the way of searching for a library on each platform.
Added isIdentity method
Added a VirtualViewport to help with keeping the aspect ratio and
handling a fixed viewport.
Natives: Switched to java.runtime.name for Android

We currently check the VM name which is Dalvik, but in the future this vm name might change to ART. In order to make sure that applications do not break if such a change occurs, switching now might be the best option
Cleaned up the changes.
Added isEqual methods to MathUtils
Added tolerance to isIdentity method of Quaternion class
Added det == 0 check on renderable worldTransform to avoid exception during ModelInstance rendering
Added det3x3 method to MAtrix4 classes and modified BaseShader class to use it
Removed fastInvSqrt methods
Changed Input/Setter of DefaultShader worldViewTrans to viewWorldTrans and fixed the function
Added AbsoluteFileHandleResolver to resolve absolute paths
Removed fast math test
Merge pull request #1393 from lordjone/test

Math fixes and additions:
Getter for canvas element
Re-enable shadows for bullet, made them optional.
Update to swig 2.0.12 (afaik no relevant changes)
vs2013
Add CharacterTest