Adding JetMETCorrections/JetCorrector to analysis.

Fix cms-sw/cmssw#5442.
Merge pull request #221 from ktf/new-package

Adding JetMETCorrections/JetCorrector to analysis.
Enable slc5 PR testing for CMSSW_5_3_X.

This is to test if we can run on the dockerized mesos slave running
slc5 ontop of slc6. If this works we can actually claim more resources
to slc6.
Improve printout of what was done / errors.