Andreas Troelsen d30bd96a2a Add support for picking nothing. ... This commit introduces the strange concept of a singleton ThingPicker that only ever picks `null`. The purpose of this picker is to allow for a type of "loot table" experience similar to that found in other games. An example would be a piece of equipment that only has a 50 % chance of dropping. With the current state of MobArena, it would be necessary to something conjure up a CommandThing or something to emulate nothingness, but now there is native support for it with the `nothing` keyword. The nullability of rewards also has the side effect that we got to clean up the MASpawnThread `addReward` method a bit. Closes #638		2020-08-22 17:36:30 +02:00
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main	Add support for picking nothing.	2020-08-22 17:36:30 +02:00
test	Add ThingPickerManager.	2020-08-22 17:12:29 +02:00