D-Net

#1304 fixing integration tests by changing fundingClass contents in project.json to be complaint with new requirements (two chunks separated with '::')

#1304 removing sqlite integration test after model refactoring - it is impossible to maintain projects.db file in a reasonable way, plus this test is covered by main project referenceextraction integration test

#1304 merging 20150518_new_funding_model branch back to the trunk

#1335 fixing SQLError appearing when empty input provided, introducing set of integration tests

#1260 introducing first draft of pdb reference extraction, output schema is shared with research initiatives reference extraction: DocumentToConceptId

#1260 introducing first draft of pdb reference extraction, output schema is shared with research initiatives reference extraction: DocumentToConceptId

#1293 increasing cutoff threshold

#1257 dropping schema generation related hacks in streaming modules, switching to literal schema parameters

Removing usage of working_dir from Java workflow node.

#1154 bugfix 2: supporting empty projects datastore