Work on API now.
Merge branch 'master' of github.com:AKSW/openspending2rdf

Conflicts:
	src/main/java/org/aksw/linkedspending/OpenSpendingDatasetInfo.java
	src/main/java/org/aksw/linkedspending/Sparql.java
	src/main/java/org/aksw/linkedspending/tools/CreateHistogram.java