Update changelog and congratulate Frank on his contribution!!

CHANGES.md

@@ -7,6 +7,8 @@ You might be looking for:
 
 ### Version 1.3.0-SNAPSHOT - TBD (javadoc [lib](https://diffplug.github.io/spotless/javadoc/spotless-lib/snapshot/) [lib-extra](https://diffplug.github.io/spotless/javadoc/spotless-lib-extra/snapshot/), [snapshot repo](https://oss.sonatype.org/content/repositories/snapshots/com/diffplug/spotless/))
 
+* Added support for Groovy via [greclipse](https://github.com/groovy/groovy-eclipse).
+
 ### Version 1.2.0 - April 3rd 2017 (javadoc [lib](https://diffplug.github.io/spotless/javadoc/spotless-lib/1.2.0/) [lib-extra](https://diffplug.github.io/spotless/javadoc/spotless-lib-extra/1.2.0/), artifact [lib]([jcenter](https://bintray.com/diffplug/opensource/spotless-lib), [lib-extra]([jcenter](https://bintray.com/diffplug/opensource/spotless-lib-extra)))
 
 * Deprecated `FileSignature.from` in favor of `FileSignature.signAsSet` and the new `FileSignature.signAsList`.

README.md

@@ -77,6 +77,7 @@ lib('scala.ScalaFmtStep')                        +'{{yes}}       | {{no}}
 	+ implementing up-to-date checking [#31](https://github.com/diffplug/spotless/issues/31)
 	+ breaking spotless into libraries [#56](https://github.com/diffplug/spotless/issues/56)
 	+ lots of other things, but especially the diff support in `spotlessCheck`
+* Huge thanks to [Frank Vennemeyer](https://github.com/fvgh) for [Groovy support via greclipse](https://github.com/diffplug/spotless/issues/13).
 * Huge thanks to [Stefan Oehme](https://github.com/oehme) for tons of help on the internal mechanics of Gradle.
 * Formatting by Eclipse
 	+ Special thanks to [Mateusz Matela](https://waynebeaton.wordpress.com/2015/03/15/great-fixes-for-mars-winners-part-i/) for huge improvements to the eclipse code formatter!

plugin-gradle/CHANGES.md

@@ -2,6 +2,8 @@
 
 ### Version 3.3.0-SNAPSHOT - TBD ([javadoc](https://diffplug.github.io/spotless/javadoc/snapshot/), [snapshot](https://oss.sonatype.org/content/repositories/snapshots/com/diffplug/spotless/spotless-plugin-gradle/))
 
+* Added support for groovy formatting (huge thanks to Frank Vennemeyer! [#94](https://github.com/diffplug/spotless/pull/94), [#89](https://github.com/diffplug/spotless/pull/89), [#88](https://github.com/diffplug/spotless/pull/88), [#85](https://github.com/diffplug/spotless/pull/85))
+
 ### Version 3.2.0 - April 3rd 2017 ([javadoc](https://diffplug.github.io/spotless/javadoc/spotless-plugin-gradle/3.2.0/), [jcenter](https://bintray.com/diffplug/opensource/spotless-plugin-gradle/3.2.0))
 
 * Update default KtLint from 0.3.1 to 0.6.1 (thanks to @kvnxiao [#93](https://github.com/diffplug/spotless/pull/93)).