Add make target for CPPUnit tests.
Implement NBT::Scalar, except for clone.
Add a unit test framework and add a test suite for NBT::Scalar.
Add some new functions to the Tag superclass.
Make app_name an std::string as Glib::ustring functionality is unnecessary.
Rip out more unnecessary stuff.
Add some initial NBT-handling classes.
Clean up Makefile a bit.
Delete another old file.
Rip lots of stuff out and prepare for the rewrite.