Larger cleanup commit. Merges occurrence-common-download module into occurrence-common. Replaces all org.gbif.occurrencestore packages and properties with org.gbif.occurrence for consistency
Merge branch 'master' of https://github.com/gbif/occurrence

Conflicts:
	occurrence-persistence/src/main/java/org/gbif/occurrence/persistence/OccurrencePersistenceServiceImpl.java
	occurrence-persistence/src/test/java/org/gbif/occurrence/persistence/OccurrencePersistenceServiceImplTest.java
	occurrence-ws/pom.xml