- authlevel to set levels of access player has in robot sandbox (0 = ordinary, 1 = robot, 2 = puzzle, 3 = admin)
- authlevel is stored in metadata of robot and digitally signed using server private password to prevent abuses
- minor bugfixes
- new giver and checker blocks for puzzle, can create locks and keys now

-puzzle privs, puzzle mechanics

new gui system api
self.display_text now just outputs texture if third argument missing

simple encryption for secret stuff - make your programs secret so other players dont steal them and more

fail at initial energy read from fuel time
protection check for keyboard set

-check operations code
-energy rewrite

technic: build your technic machines incode with machine.generate_power, machine.smelt, machine.grind, machine.compress. Requires fuel and materials just like the real thing.

-added scripts

- form display and handling for robots

-read_text can now read (int) numbers from node meta
extra:
-robot can now fertilize farming:soil_wet by inserting farming:fertilizer into it

-robot now has "energy", each round of execute gives 1 energy up to max 1. to dig stuff, 1 energy is expended
-find_player, pickup, player.connected now all return list or nil
-check_inventory can look at i-th item in inventory and return its name

mesecons compatibility: can be activated by mesecons signal and can activate mesecons blocks. to turn on wires use delayer first

replaced expensive function calls with "if"

book editor/code loader

several robots per user
off signal to spawner from mesecons/basic_machines removes robot

pickup: picks up entities around robot
table of items it wont pickup

allow potentially malicious instructions like for, goto, while but preprocess script to insert counter, this prevents too long executions