add encodingType property and property listener
add ALAudioEngine#playing property
implemented encodingType and maxUVCount property
implemented ProjectProxy#initializeMotion, fixed bug of parent undo
post notification area instead of console.log
add assertion of thread
fixed a bug of dangling pointer of model's QUndoStack
prefer to use QMutableListIterator at deleting models/motions
synchronize RenderTarget class
add MotionProxy#dirty and cleanup undo/redo handling
use VersionType due to float handling
add ModelProxy#save method
add menus and it's actions