Added rajawali.RajawaliFragment

RajawaliFragment allows you to build non-fullscreen Rajawali applications.
For an example see https://github.com/ccoffey/RajawaliExperiment
Move "Made With" to Wiki
Merge pull request #314 from ccoffey/master

Added rajawali.RajawaliFragment
MD5 GPU vertex skinning

Added AnimationSkeleton class to serve as skeleton container for
BoneAnimationObject3D objects.

GPUSkinningMaterial extends PhongMaterial with vertex shader source
which calculates vertex positions
Update src/rajawali/animation/mesh/AnimationSkeleton.java

AnimationSkeleton is a container for BoneAnimationObject3D objects.

It calculates BoneMatrices by multiplying them with InverseBindPoseMatrices so that vertex bind pose positions can be used to calculate new vertex positions:

boneMatrix = boneTranslation * boneRotation * mInverseBindPoseMatrix

and 

position[i] = sum(weight[j] * boneMatrix[index[j]]) * bind_position
Update src/rajawali/animation/mesh/BoneAnimationObject3D.java

If GPUSkinningMaterial is used no calculations need to be performed.
Merge pull request #331 from CZdravko/master

MD5 GPU vertex skinning
Merge branch 'master' of https://github.com/MasDennis/Rajawali