PAT-Tuple Locations

I have updated the `MetaData/tuples/PATTuples-8TeV.json` file to contain more up-to-date PAT-tuple locations. When running n-tuples, you can use the `--tuple-dirs=$fsa/MetaData/tuples/PATTuples-8TeV.json` option as shown in `NtupleTools/test/README.rst`. Fixes Issue #344.