fix mixed operand equality dealing with null
make custom runtime expressions (only supported from queries) reusable after type system resets between tests
Change versions to 1.3 / 3.7
Merge branch 'rel/1.3' into master

Conflicts:
	gosu-core-api-precompiled/pom.xml
	gosu-core-api/pom.xml
	gosu-core/pom.xml
	gosu-interactive/pom.xml
	gosu-itcase-utils/pom.xml
	gosu-maven-plugin/pom.xml
	gosu-parent/pom.xml
	gosu-process/pom.xml
	gosu-servlet/pom.xml
	gosu-test-api/pom.xml
	gosu-test/pom.xml
	gosu-webservices/pom.xml
	gosu-xml/pom.xml
	gosu/pom.xml
	idea-gosu-plugin/META-INF/plugin.xml
	idea-gosu-plugin/pom.xml
	ij-compiler-api/pom.xml
	ij-editor-devtools/pom.xml
	pom.xml
fix test