1.Added configuration of app dependent on engine version.
2.Added prompt message, if app configuration does not match current engine version.

[git-p4: depot-paths = "//xFace-Apollo/branches/openxface-android/": change = 17176]
1.Optimized engine play HTML5 video.
2.Supported back key to exit when HTML5 video is playing.

[git-p4: depot-paths = "//xFace-Apollo/branches/openxface-android/": change = 17177]