Merge pull request #4 from dmwm/htcondor_poc

Htcondor poc
Propagate files size and checksums.
Merge pull request #4141 from mmascher/movemodule

Move HTCondor* modules up one level and include them in setup.py
Merge pull request #4140 from HassenRiahi/AddFileSizeChecksum

Add file size checksum
Add support for EventBased splitting in DagmanCreator's SPLIT_ARG_MAP
Add forgotten testing code for running a single process instance of the taskworker (I find it useful for debug)
Add again (and refactor) monte carlo use case