Ref ticket #394 - Readding tubclean web interface files.

+ tubclean interface re-added.
+ Hash values for scripts updated appropriately (Chrome doesn't block them now)
+ Added a "Fast forward 10 seconds" function to the interface.

Adding tensorflow.python prefix to "keras" imports where required

Fix "ShowCnnActivations" by adding tensorflow.python prefix to "keras" imports.

Instructions to build OpenCV from source

XBox controller has throttle reversed, so added throttle_dir config