Add better control over expression timeouts.
* //timeout command can be used to change player's current timeout.
* Config now also has a max timeout, can be bypassed with permission
* Timeout of < 0 will let expressions run indefinitely.
* Said expressions won't run on a separate thread, slightly reducing the
overhead from context switching. For large //gen commands, for example,
this can actually increase speed.
The initial material is held in the factory, but if a brush was previously bound, that pattern is used.
Now, using `//br set` will clear the previous material, allowing the OperationFactory's material to work.
This can be changed later with `/mat`, which will once again set the fill on the tool, overriding the factory's context.
This patch touches many files but changes absolutely no functionality.
The goal here is to make future merges with worldedit produce fewer
conflicts that have to be resolved.
This patch was made by painstakingly diff'ing files and copying changes
over from the last upstream merge commit (02c6f11b) into this codebase.
Signed-off-by: Byron Marohn <combustible@live.com>
