BlackBerry 10] SampleHost

  * Created a minimal sample host that initializes an AKU
    context.
  * Removed BlackBerry's box2d and used the one from 3rdparty.
  * Ported 3rdparty/box2d to BlackBerry
[BlackBerry 10] SampleHost

  * Fixed USDeviceTime_posix.cpp to return the correct time.
  * AKU is working properly.
  * Added multi touch handling.
  * Only portrait apps work.