Added plural/singular detection.
Merge branch 'master' of github.com:AKSW/SPARQL2NL

Conflicts:
	src/main/java/org/aksw/sparql2nl/naturallanguagegeneration/SimpleNLGwithPostprocessing.java
	src/test/java/org/aksw/sparql2nl/Evaluation.java
Added SPARQL query processor.