Extensions are now able to return conflicts.
Merge branch 'nbandroid_integration_radimk' of git://github.com/radimk/netbeans-gradle-project into nbandroid_integration

Conflicts:
	src/org/netbeans/gradle/project/model/GradleModelLoader.java
Add basic integration test to verify extensions.
Merge branch 'nbandroid_integration' of git://github.com/radimk/netbeans-gradle-project into nbandroid_integration
Fixed some compilation error after merging.
Merge branch 'nbandroid_integration_radimk_test' of git://github.com/radimk/netbeans-gradle-project into nbandroid_integration
Fixed a memory leak in test code.
Fixed errors in GradleTestExtension due to refactoring.
Fixed formatting in GradleProjectExtensionQueryTest.
GradleProjectExtensionQueryTest now automatically downloads the Gradle distribution rather than relying on global properties.
Fixed a minor error in GradleProjectExtensionQueryTest.tearDownClass.
Fixed imports.
Made the test code more robust. Except that it is now fails to connect to the Gradle daemon :).
Fixed the Gradle daemon loading problem in test code.
Fixed test code, so that it no longer fails on Windows.