Fixed icon and detail view for general files
Added Tags, FileTags, Sorting Options...

- Added Tag- and FileTag-Entities and a corresponding migration.
- Added orderBy-Argument in contentfiles/datacontext.searchFiles.
- Added Tag-Support in contentfiles/datacontext.
- Show and edit tags in contentfiles detail view.
- Added sort support in contentfiles index view.
Minor css fix, Increased Version
UI: Moved container class to module/page

Some pages may use a container but others may be full screen. By moving
the container class to the module/page, every view can decide.
Improving Tag-Support

- added tagService
- moved Tag-related things to app datacontext so all modules can use it
- added Query-support on the server (PredicateBuilder, FilterModel,
DbFileFilterModel,...)
- UI changes
Updated some Nuget Packages

- toastr
- breeze
- moment
- Antlr
Filtering Files by Tag

- improved Tag-Support in infrasturcture/datacontext.
- tagService: add tag to internal list after creating it.
- contentfile/datacontext: removed "forceRefresh". Let breeze do it´s
work.
- contentfile/detail: removed "forceRefresh". Use tagService to add
tags.
- contentfile/index: cleanup and restructuring.