Spockified a test
Spockified / tidied up the coverage for TestNGTestFramework.

It seemed a reasonable approach to replace mock frenzy with more targetted and reasonable coverage, focused on logic that is interesting to test.
Added one sentence to publications
improvements to scala parts of release notes
Made the links in the release notes relative
whitespace
minor formatting.
Inserted line breaks into depenencyInsight section, didn't change any content.
Make mention of resolution result in new publish section a link.
Fix TestNG anchor link.
Fix publishing anchor link.
Added release notes preface.
UK english to US english. Damn Zs.
Wording improvements to preface.
Merged the release
Bumped the wrapper version to use latest RC.
fixed mapping of zinc scala compiler log levels
Ignored the test until I figure out the solution. At the moment the test expects the current Gradle version to use different artifact cache than the Gradle versions we test against.
GRADLE-2486: Dont use shared Ivy.DATE_FORMAT in IvyXmlModuleDescriptorWriter.
GRADLE-2486: Add IvyXmlModuleDescriptorParser (copied from ivys XmlModuleDescriptorParser) and recreate SimpleDateFormat instance instead of sharing IVY.DATE_FORMAT