Minor API change, added methods to query list of all block/item drivers. Mainly to allow third-party mods to make any use at all of the EnvironmentAware interface.
Calling EnvironmentAware.providedEnvironment on block drivers for *all* stacks, after all, not filtering by ItemBlock - fails even for vanilla (comparator, sign, ...) so this certainly will be too restrictive for mods, after all.
Added EnvironmentAware to a bunch of third-party block drivers.