Nckw added python driver

Added a python driver for executables. (a bacon batch is a bacon sandwich in the UK ) 
given an executable (eg runBacon.cpp) can drive/submit to batch/monitor jobs with baconBatch.py 
pass /store or local directory to automate analyzer job splitting over Bacon Ntuples

TO DO: 
1) add support for EOS ouput (though probably unecessary)
2) add safety check for executable