Minecraft World Utility Code

Delete lots of unneeded utils.

Implement compounds.

Reorder the List unit tests to be in a more sensible order (equality before cloning).

In utility functions for building data structures, clear the structure before building the new one.

Use a type that actually exists for checking the type code.

Implement full printing support for all tags in the unit tests.

Make use of operator== being available on tags to simplify a couple of unit tests slightly.

Keep the expected serialized form of the complicated list in one place (in misc.cpp) instead of in both the parsing and serializing unit test modules.

Check the result of parsing a complicated list.

Refactor object printing support code into cppunit/nbt/misc.h.