add number of pixel hits with max layer/disk argument
simplify number of pixel hits with max layer/disk argument
Merge pull request #3078 from cerati/add-hitpattern-methods-slhc

Add numberOfValidPixelHits methods with maxLayer/maxDisk
Merge pull request #86 from cms-sw/CMSSW_6_2_X_SLHC

Cmssw 6 2 x slhc