Add documentation groups to action*
Add documentation groups for command*
Add all compositor stuff to compositor group
Add all compositor/buffer stuff to compositor_buffer doc group
Add all compositor/wayland stuff to compositor_wayland doc group
Add connection* stuff to connection doc group
Add all input* stuff to input doc group
Add all abstract serializer stuff to serializer doc group
Rewrite doc grouping for json serializer backend
Add session files to session doc group
Add storage files to storage documentation group
Add documentation groups for object types
Added per-module documentation files
Add documentation files to modules
Add DoxygenLayout.xml file
Remove "pages" on navigation
Do not show collaboration graph
Move detailed description to top of page, remove collab graph
Remove groupgraph and move detailed desc to top of page
Merge pull request #566 from matthiasbeyer/setup-developer_documentation

Setup for developer documentation