Move BVH loader to libgdx

[yuripourre]

https://github.com/Harium/propan/blob/master/src/main/java/com/harium/propan/core/loader/motion/BVHLoader.java

Good source:
https://github.com/mgsx-dev/gdx-gltf/blob/master/gltf/src/net/mgsx/gltf/loaders/shared/animation/AnimationLoader.java

https://github.com/libgdx/libgdx/wiki/3D-animations-and-skinning

jMonkey implementation:
https://github.com/Nehon/bvhretarget/blob/master/src/com/jme3/scene/plugins/bvh/BVHLoader.java

[yuripourre]

Example of CC0 bvh file.

http://www.makehumancommunity.org/content/playing_guitar.html