Set supported_games = *
Add settings documentation
Update minetest globals
Add option to select only nodes of the same type
Less ugly texture
Use metadata helpers
Adjust field width
Check privs on form submission
Move some generic functions to lib.lua
Add diagonal (go through vertices) setting
Add overwrite setting
Update tool description
Add extrusion amount setting

* add settings formspec
readme: mention remove feature
Fix luacheck warnings
on_use: move node check to top conditions