IsoCalib01

Modifications to improve IsoTrackHB/IsoTrackHE HLT's to improve efficiency and trigger rate (also speed). Also added codes to do the IsoTrack calibration (preparation of ROOT trees and do offline calibration)
Second attempt:
```
<class name="reco::IsolatedPixelTrackCandidate" ClassVersion="11">
<version ClassVersion="11" checksum="264617237"/>
```