Misc Bugfixes

- Fixed some "Null Reference"-Bugs.
- Fixed handling of Durandals compositionComplete-event.
- Fixed CSS Problems.
- Revised properties area in sitemap module.
Provide meta keywords and meta description in...

CapsSiteMapNode.
- Added ToAbsolute-Url-Helper.
- Fixed bug in publicationService.setNodeContent. (Load full content
before publishing)
- Added SraftSelectionDialog and contentSelection-PlugIn.
- Implemented "Set page content" in sitemap index.
Misc Bugfixes

- Avoid null reference exception in ContentModel.HasPart.
- Set root node properties from DbSiteMapNode.
- Add contentEditing service. That allows one plugIn to request the
editing of a entity managed by another plugIn.
- Misc visual details.
Updated Modernizr and Bootstrap
Improved handling of file versions. Changed ...

... some wording in UI. Started reworking contentfiles module.
Implemented a way to replace multiple files
Updated Entity Framework to 6.0.2. Updated Bre...

...Breeze to 1.4.7.
- Moved responsibility to provide unique id to ContentScriptManager.
- Added a quick and dirty way to use one ContentScriptManager in
multiple ContentViewModels.
Added ContentVersion-Property to CapsSiteMapNode.

Ignore empty content parts when creating a ContentViewModel. Show
content controls in draft and publication preview.