Add formspec toolkit and refactor mainmenu to use it
Fix crash on using cursor keys in client menu without selected server
Add support for non fixed size tabviews
Fix singleplayer dialogs missing game customization
Split declaration of GenericCAO from implementation
Add support for interlaced polarized 3d screens
Add (experimental) support for topbottom as well as sidebyside 3d mode
Add joining player to printed player list
Fix memory leak in redis backend, fixes #1325