Condor improvements & new features

[kreczko]

Some of this stuff should help us to more easily formulate workflows where we want more than one job per file (e.g. extensive fitting):
http://research.cs.wisc.edu/htcondor/HTCondorWeek2015/presentations/KnoellerJ_New_Submit_Features.pdf

Also useful:
http://research.cs.wisc.edu/htcondor/HTCondorWeek2015/presentations/VahiK_Pegasus_Tutorial.pdf

And:
https://github.com/crcox/condortools

[kreczko]

This now also relates to BristolTopGroup/DailyPythonScripts#225 and I would be in favour of moving the condor bit to https://github.com/BristolComputing for sharing between our 3 projects