replaced compare() call for backwards compatibility
stopped local Exceptions being RuntimeExceptions
Merge branch 'master' of https://github.com/aehrc/snorocket

Conflicts:
	snorocket-core/src/main/java/au/csiro/snorocket/core/NormalisedOntology.java
	snorocket-core/src/main/java/au/csiro/snorocket/core/model/IntegerLiteral.java
	snorocket-core/src/main/java/au/csiro/snorocket/core/model/LongLiteral.java