Initial version of histogram archiving

This merge request adds basic archiving of histograms.

At user specified intervals and at the end of run, the module calls a python script which archives all histograms in REDIS updated within a user specified time interval as a gzip'ed json file. The default is to archive once per hour and to the /home/data area with a filename that allows the data archiving script to pick it up and automatically archive it further to EOS disk and tape.