Bibarchive: File transer uses pyFS

* OS functions for copying replaces with pyFS functions
Bibarchive: Added configuration

* User can choose whether archives are store in FS, mongo or both

* Archive can be located in mongo, fs or both
Bibarchive: Versioning put in place

* Configurable number of versions kept (in config)

* Versioning implemented for mongo and filesystem storage
Bibarchive: Daemon Created

* CLI created for bibarchive
Bibarchive: Logger added

* All actions carried out using Bibarchive are recorded
in the arcLOG table.
Bibarchive: MARC stored in bagit

* The records MARC is now stored in bag-info.txt
BibArchive: 0 versions kept = infinite

* If versions kept is set to 0, then nothing is ever deleted