Fixes #457.
Refactored test cases.
Merge branch 'master' into es041
Fixes #426.
Implementation of additional parameter specification for indexes. These parameters can modify the behavior of the index. For instance, a mapping specification is now supported for ES and Lucene when it comes to strings (index them as TEXT or STRING). This fixes #410.
Updated javadoc, changelog and moved mapping class.
Fixed getNew for graph queries when there is no constraint.
Implemented support for raw queries against the backend.
Fixed test case and " parsing in raw query.
Merge branch 'es041'