Adding license text in obdalib-core package.
Adding license text to all source code in obdalib-owlapi3 package.
Adding license text to all source code in obdalib-protege41 package.
Adding license text to all source code in quest-db package.
Merge branch 'release/1.8' of ssh://github.com/ontop/ontop into release/1.8
Adding license text to all source code in quest-owlapi3 package.
Adding license text to all source code in quest-rdb2rdf-compliance
package.
Adding license text to all source code in quest-sesame package.
Adding license text to all source code in quest-sparql-compliance
package.
Adding license text to all source code in reformulation-core package.
Merge remote-tracking branch 'refs/remotes/origin/release/1.8' into release/1.8
Add new methods to check if such modifier exists or not.
Add new method interface to check if the predicate uses "triple" symbol.
Add immediately known prefixes in the SimplePrefixManager class.

This implementation removes the need of users to add known prefixes in
their code (including in the test cases).
Make the build script to use absolute path.
Merge branch 'release/1.8' into develop
Fix the script to move to the ROOT directory.
Merge branch 'release/1.8' into develop
Add hasModifiers() method interface to check if the query has modifiers.
Add new vocabulary for Quest query predicate "ans1".