Removed old SQLParser
Added and fixed comments
Merge branch 'feature/identifierCasingTests' into feature/jsqlParser
adding casing tests.
Bug fixing and comments added
update aliases to change value in lowercase
Return columns of the query in VisitedQuery
fix an issue in ColumnsVisitor for Unions
removed bug in alias map
clean up mappinganalyzer and make it easily extendable
add BETWEEN clause and some tests
more cleanup of mappinganalyzer
implemented value IN (set) SQL clause for simple expressions
support simple join clauses
create view for any not supported function/operation
Changed not supported features in Parsertest
SQL LIKE
Issue #7, #8, #15 solved
Update to JSQLParser version 0.8.8
Support simple subselect queries
Support simple join conditions
Add not supported notification to the rest.
Update parser and mapping analyzer tests.
Merge develop into jsqlParser branch
Support for new Alias class JsqlParser
fixed getVariable in MappingAnalyzer
Merge branch 'feature/jsqlParser' of https://github.com/ontop/ontop into feature/jsqlParser

Conflicts:
	obdalib-core/src/test/java/it/unibz/krdb/obda/utils/MappingAnalyzerTest.java
Merge develop into jsqlParser