no longer QtConcurrent will be used
use static Vertex variable instead of direct type
corrected video encoding process
added libav to AboutWindow
make video encoderable
added Regal task, removed flascc/emscripten, change libav flags
vpvl2 now uses assimp v3.x and upper
prevent null access of scene.currentMotion
display playing/encoding state at top left
display encoding frames count
moved adjustPath as Util::resourcePath
fixed a bug morph slider in model tab doesn't work