Issue #33. Don't generate isSet methods. Use
generateMixedExtensions=true.
Updates schemas.
Issue #33. Ignores for GML 3.1.1.
Switched to the maven-jaxb2-plugin version 12.1.
Issue #33. New scripts.
Issue #33. Temporary disabled
Merge branch 'master' of https://github.com/highsource/ogc-schemas
Issue #33. A demonstrating test case.