fix review issues
Merge pull request #10 from Wikidata-lib/suggestQualifiersAndReferences

Suggest qualifiers and references
Merge branch 'master' of github.com:Wikidata-lib/PropertySuggester-Python into use_idf_to_rank_common_properties_lower

Conflicts:
	propertysuggester/analyzer/impl/MainAnalyzer.py