Deprecated old command API
I will be adding in a new one, which will use annotations to mark
subcommands
Removed most deprecations
The command API will continue to exist, but will not be the focus of
development, and it does work for some use cases
Added annotation-based command framework
Still WIP, but when complete, will allow easier-to-write base commands,
which use individual methods to represent subcommands

The old command system is still present, as it may be better for some
cases, but code is easier to write with the new system

The new system is present in the package
me.pagekite.glen3b.library.bukkit.command.annotation, which represents
annotation-based command programming, GBukkitLib's newest feature