Implements #265 multiple framesets support

applications/gui/src/camera.cpp

applications/gui/src/camera.hpp

applications/gui/src/src_window.cpp

applications/gui/src/src_window.hpp

components/codecs/src/nvpipe_decoder.cpp

components/rgbd-sources/include/ftl/rgbd/frameset.hpp

components/rgbd-sources/src/frameset.cpp

components/streams/include/ftl/streams/receiver.hpp

components/streams/include/ftl/streams/stream.hpp

components/streams/src/injectors.cpp

components/streams/src/injectors.hpp

components/streams/src/receiver.cpp

components/streams/src/stream.cpp

components/streams/test/receiver_unit.cpp

components/streams/test/stream_unit.cpp