- Adds material for crafting (keeps def.recipe compatibility)
- Fix two typos in api documentation

Create register ores function. Select and order functions per mapgen
Use blob ore for clay. Update ore height_min/max to y_min/max
Tune flower amount

can be registered by other mods

1. don't delete protected nodes, 2. time out in loaded chunks, 3. don't crash when dying in certain nodes (like default doors or sign_lib signs)

Screenshots at: https://github.com/minetest/minetest_game/issues/411

I think that was just a typo?

* Remove unused variables
* Fix wearing out of screwdriver
* Move magic numbers into constants
* Scale down texture

Pinetree (by sfan5, from mg mapgen) lua generation and sapling ABM. Add checks for ignore to other trees