Add * to end of pidFilter filter query

Documentation for pidFilter is "Return only log records for identifiers that start with the supplied identifier string"
Add missing zero to checksum bytes when < 16
Merge pull request #242 from datadryad/trello-9-dataonemn-6

Fixes pidFilter and checksum issues reported on 2013-05-22
Merge branch 'dryad-master' into dryad-dev