Fix order of contributors in New Project Content Provider Wizard
Reverted config changes due to database problems (_contentId on Resource
was null after re-reading the db)
Introduced ZipFileCache
New UI-Action: Create a Module from selected package and resource
artifacts
When switching to "manual add mode" save previous stage
Added 'disabled' icons
Display 'disabled' icons for artifacts that are not staged
Align with Artifact Stage: React on empty selection
Merge pull request #172 from nilshartmann/master

Enhancements