[Codechange] Rewrite of discussion components, improved structure.
[Fix] DiscussionPaginator link generation
[Add] Comments in gallery
[Codechange] Gallery/edit-image: Improved authorization
[Fix] Gallery: thumbnail cache cleared when updating image
[Add] CMS pages index and creation
[Fix] Gallery/add-image: Missing database entries
[Git] .gitignore: Added Kate text editor temporary file
[Add] CMS editing and deleting
[Fix] Improved error handling.
[Text] Improved CMS section welcome text
[Fix] Added error reporting to form.
[Change] Login/logout no longer redirect to homepage.
[Add] Authorizator now handles not-logged users
[Add] Section 'texts'
Merged branch 'discussion-rewrite'