Recipe git

Hello,

Here are some changes for the git-based recipe.  The big change is from ./recipe_legacy8TeV.sh to  ./recipe_8TeV.sh.  It has substantially fewer addpkgs, because most of the PAT improvements were integrated already into 5_3_14.  The smaller changes are these:
- fixes for PUJetID and MVAMET
- remove kinit (as this recipe is git-only)
- the trigger-matching patch is slimmed down (as most of it is already in 5_3_14);
- the patches PATObject.h.patch and PhysicsToolsPatAlgos_fix_btags_52X.patch are commented: are they still needed?

@zaixingmao has made some PAT-tuples using this recipe (including also pull requests #312 and #298), and it seems to work AOK.

Ted