* JmeVersion is no longer autogenerated, instead it pulls info from version.properties
* Added version.gradle script to generate version info and expose it to other gradle scripts
* Embed version info inside JAR manifest
* Refactor NDK finding to use the same way as the version generation
* All platforms now use asset configuration files. Subclasses of DesktopAssetManager no longer required.
* Added general asset config file which is included by all
* JmeSystemDelegate now always returns DesktopAssetManager
* JmeSystem is now responsible for providing the platform-specific asset config path
* Deprecate JmeSystem.createImageRaster(), it is simpler to create a DefaultImageRaster
Fix using AssetManager.loadModel() with fbx file causing to throw
AssetLoadException.
Implemented loading of new file format .fba - .fbx file with animation
mapping.