support for categories added to source dataset registration
TableNotFound response for DescribeTable implemented
table name converted to uppercase
.xml removed from metadata id
logging infrastructure implemented
GetHarvestLog implemented
Initiator based on logging events in the database implemented
Ack and HarvestSession implemented
source dataset registered log event added
Registered and AlreadyRegistered messages implemented
Merge pull request #28 IDgis/harvester-improvements

Conflicts:
	publisher-database/src/main/java/nl/idgis/publisher/database/PublisherDatabase.java