New ARM format to load armatures x10 times faster.

- The new ARM text format allow to store armatures only (not the whole
SVG file used to create art for them). The format is very simple.
- The SVGArmatureLoader allows to directly convert a SVG armature to an
ARM file.
- A new ARMArmatureLoader allows to load an create Armature from ARM
files.
- The Libraries are now able to handle « .arm » files.
Adapting SOFA to Android.