Merge pull request #112 from intportg/dev

Menu block and default theme
Add Http/Rest/Query
Merge pull request #113 from inthause/documents

Add Http/Rest/Query
FIX post delete document references cleaning (tree, metas, relations)
Merge pull request #114 from inthause/documents

FIX post delete document references cleaning (tree, metas, relations)
[NEW] Add SiteMap and Thread blocks.
[NEW] Improve URL generation.