Fix for missing Id's on FileService.GetStylesheets() call.  This is needed as sytlesheets can only be loaded in the editor via their Id so listing stylesheets needs to list there Id as well for custom plugins to render the build in editor.
Removed dependence in Stylesheet repository on Entity Service.
Fix sql errors in prev change.
Merge pull request #176 from pynej/add-stylesheet-ids

Fix for missing Id's on FileService.GetStylesheets() call.  This is need...