Issue 128: Loading org.gradle.language.jvm.(Jvm)ResourceSet classes based on availability in the classpath. Since Gradle 2.2 the classes have been renamed, so both class names and the implementation classes need to be supported.
Merge pull request #129 from mrhaki/default-resouce-set-changed-in-gradle-2_2

Issue 128: Check if classes are available on classpath before loading