Running script on backup library.
Merge branch 'master' of github.com:michielkauwatjoe/MusicHasTheRightToChildren
Adding object to walk through backups, adding command line counter.
First results for backup compare.
Not sure if this is going to be needed.
Renaming to retrieval.
More renaming and testing.
Initialisation for base class.
Merge pull request #2 from michielkauwatjoe/master

Lots of renaming, testing on a larger collection, starting collection compare.