This patch adds the basic infrastructure to have openCL acceleration.
For now only YUV2RGB is implemented but other operations could be
implemented.
The primitives have been massively reworked so that we have an autodetect
mode that will pick the best implementation automatically by performing a
benchmark.
Sponsored-by: Rangee Gmbh(http://www.rangee.com)
Implements the decoding of video streams using common H264 decoders. We also implement
a trivial feedback algorithm.
Sponsored by: Rangee GmbH (http://www.rangee.de)
