Added 'actions' for each Document in the result of a Document Collection.
Added possibility to choose which selectors to use in the Markdown editor. StructureEditor only use 'media' and 'links' selectors for now.
Workflow fixes and enhancements.
Fixed localization.
Added workflow (still needs localization and UI in Document Editors).
Merge pull request #378 from fredericbonjour/Admin

Added workflow UI.