cleanup of photon conversion tools (ISF_FatrasTools-00-03-35)

	* remove PhotoConversionSampler ( duplicates PhotonConversionTool )
	* tagged as ISF_FatrasTools-00-03-35

2015-06-12 Sharka Todorova <sarka.todorova@cern.ch>
	* updates for old extrapolation
	* dependence on TrkExEngine removed from McMaterialEffectsEngine
	* tagged as ISF_FatrasTools-00-03-34

2015-06-08 Sharka Todorova <sarka.todorova@cern.ch>
	* bugfix in McMaterialEffectsEngine
	* tagged as ISF_FatrasTools-00-03-33

2015-06-05 Sharka Todorova <sarka.todorova@cern.ch>
	* cleanup of duplicate eloss tools
	* tagged as ISF_FatrasTools-00-03-32

2015-05-22 Sharka Todorova <sarka.todorova@cern.ch>
	* add missing l0 info
	* tagged as ISF_FatrasTools-00-03-31

...
(Long ChangeLog diff - truncated)