Bug fix to dqm crash



See merge request !24

Dev

New library libPh2_Tracker.so containing the class TrackerEvent to generate the Phase-2 Tracker data format and ParamSet to manage condition data (and others) parameters.
dataset -r option to playback a raw file generated by the GlibStreamer
dataset -c option to specify a parameter file. Those parameter files are compatible with those used to configure condition data in the GlibStreamer

See merge request !21

Environment Variables expansion in HWDescription file

This was already pushed in the commit of 7-dec-2015 but was partially removed in the next one

See merge request !19

Environment Variables expansion in HWDescription file was already pushed in the commit of 7-dec-2015 but was partially removed in the next one