Updated NbtReader comments.
Updated assembly versions to 0.6.0
Updated README.txt
Sped up NbtList constructor and ListType setter.
NbtWriter's BeginList(...) methods now validate given list type.
Expanded NbtWriter and NbtList unit test coverage.
Updated the changelog.
Corrected output paths for x86 and x64 build configurations.
Updated the README once again, clarifying information about .NET 2.0 compatibility.
Updated Doxyfile
Normalized formatting, and switched to using explicit "internal" modifier, to help Doxygen generate better docs.