exchanged the parsing of the regions to use yaml-cpp instead of OpenCV making the handling of optional fields easier
new rs::Exception for exceptions thrown during initialization. Should be used to send meaningful errors when things go wrong (had to do a minor change in uimacpp for this)
added optional field for defining regions relative to a frame other than map
changed drawers in PointCloudClusterExtractor and ColorHist annotator to use the normal image instead of the hd onw
RealSenseBridge can now handle the optimal resolution of the D435 (848*480)