Added support for downloading RDF
Added field for choosing persistent URI when uploading new data source
Added persistent URI column to MetaDatasources object
Added support for inserting new puri column in ws-new-datasource Web Service
Documentation updates etc.
Added handler and utility files for user and group manager
Major work-over

Modified Ajax Web Service request, added username var to session, added
register new, changed login request from GET to POST, separated logging
functions from Web Service request code.
Removed doc-generation from ANT build file