A try at getting color frames more robust.

Inspired by hovren pull request https://github.com/OpenKinect/libfreenect2/pull/72
Finding the footer by "9999" - mayby it should be found first, to use the packagelength.
More values defined in rgbpacketFooter.
A go at making the depth_packet_stream_parser better.

Iterates through all bytes to find footer.
Copy data in chunks.
Doesn't use additional working buffer.
Merge branch 'depthpacketparse'
Merge branch 'rgbPacketHandling'
Added timestamp for rgb image.
update rgb streamer.

inspecting to find magic markers.
copy data in chunks.
Verify by packetlength and sequence of footer and header.
Moved the resetting of fb to also handle if the processing is skipped.