[Gradle Release Plugin] - pre tag commit:  '1.12.1'.
[Gradle Release Plugin] - new version commit:  '1.12.2-SNAPSHOT'.
Remove references to guava, since it's not transitive.
Use ourself from 1.12 plugin-plugin
Wrap developers, so that it only gets added if there are any developers.
Merge pull request #1 from nebula-plugins/remove-guava

Remove guava and conditionally add developers section
[Gradle Release Plugin] - pre tag commit:  '1.12.2'.
[Gradle Release Plugin] - new version commit:  '1.12.3-SNAPSHOT'.
Merge branch 'gradle-1.12'
Use latest maven changes to publishing plugin
[Gradle Release Plugin] - pre tag commit:  '1.12.3'.
[Gradle Release Plugin] - new version commit:  '1.12.4-SNAPSHOT'.
Moved the ManifestOwnersPlugin to gradle-info-plugin; remove dependency on gradle-info-plugin
Fixing some build issues remaining from the removal of the gradle-info-plugin
Moved the PomDevLopersPlugin to the nebula-publishing-plugin
Removing commented out dependencies
Merge pull request #2 from nebula-plugins/feature/change-plugin-dependencies

Changing plugin dependencies
The contacts and publishing plugins have duplicated classes which caused them to have a circular dependency. The contacts plugin should be consumed from the publishing plugin.
Merge branch 'gradle-1.12'
Merge branch 'master' into remove-dep-publishing

Conflicts:
	build.gradle
	src/main/groovy/nebula/plugin/contacts/ContactsPlugin.groovy