Backporting some changes made for CMS pixel high-rate testbeam

Adding new processors:
* EUTelConvertCMSPixel uses the CMSPixelDecoder to convert PSI46 raw data to LCIO
* CMSPixelClusterTupel writes out ntuples of clusters for outside processing (could be generalized probably)
* Minor changes to other processors, some bugfixes
@simonspa this here!