Implementation of LK optical flow using fastCV

TODO:
1) Integrate openCV reference optical flow and develop a comparison between the two as
   they are not identical implementations.
2) Add tests for LK function.
2) Develop fastRPC wrappers to allow testing warp on all of native, target and simulator.
3) Attempt to replace threading code with a threading framework that can be shared
   between libraries.
4) Remove any possible dependancy on immotion.

Notes:
In order to do 3), there is a need for a common test frame work for HEXAGON SDK, this is
to avoid copying code that would be common to most tests, such as command line processing
and launching threads at simulator startup. It is ideal to implement such a framework before 
attempting 3.