streamlined configuration defaults in EclipseFeatureConfigurer and EclipseRepositoryConfigurer
unfinished transition to using lists for multiple configurations for features and repositories.
simplified feature and repository API, no more "features" and "repositories" elements are needed.
EclipseFeatureConfigurer and EclipseRepositoryConfigurer: moved config-centric methods to EclipseFeature and EclipseRepository
improved feature labels
Update README.md
Update EclipseFeature.groovy
Added Luna SR1 to Wuff.
upgraded to groovy 2.3.7, added groovy-backports-compat23
Added a mechanism to allow a plugin to import a package from org.eclipse.
Merge pull request #36 from diffplug/eclipseLunaSR1

Added Luna SR1 to Wuff.
Merge pull request #37 from diffplug/importOrgEclipse

Added a mechanism to allow a plugin to import a package from org.eclipse...
improving EclipseRepositoryConfigurer: writing site.xml to the repository
fixed bug: EclipseRepositoryConfigurer does not write feature versions to site.xml
Update LICENSE
Formatting in OsgiBundleConfigurer
started design of improved manifest merge