Main objective is to get rid of too complex setMCAccess methods and to
be able to store handles rather permanently instead.
* Remove MCAccessHolder.
* Add/refine interfaces and implementations.
* Change constructors.
This is neither complete nor final. Intentions are to group interfaces
better, rather organizing packages in a flat way.
At some point there will be other major move-arounds, but that'll
hopefully be a point where we have a better idea of where to put what
(...). For now the approach is to move interfaces/things rather where
it's not interfering with profane exemption API use, preferably neither
taking down the top level API layer
(NoCheatPlusAPI).
Added deprecated interfaces to prevent cncp to break too quickly.
Outlook:
* Classes that are rather only expected to be used internally for setup
will likely get moved around freely.
* Classes that have been added since last release might also get moved
around freely.
MCAccess will be split into smaller providers with time, so do expect
more breaking changes of this type. If this is an issue, please contact
us, so we can see how to smoothen things. E.g. we could still make
MCAccess an aggregate, that just delegates to the more fine grained
providers, or we could provide other
(default) aggregates.
This also adds a Bukkit-based provider for future updates.
