Minecraft World Utility Code

Add equality operators to NBT::Array.

Implement equality operators for NBT::Scalar.

Rename ArrayLengthNegative to LengthNegative in preparation for lists.

Fix comments.

Optimize floating-point encoding and decoding functions.

Implement and test NBT::AnyTag.

Fix exception specification for NBT::Tag::parse.

Add unit tests for NBT::Array.

Properly implement arrays.

Fix a few unit tests to pass parameters to macros in proper order.