More 2.0 support for the registry, add support for expanding strings

More 2.0 support for the registry, add support for expanding strings
and add support for type verification and explicit types in Setvalue.

The tests from the docs work now.

2006-08-14  Miguel de Icaza  <miguel@novell.com>

	* RegistryValueKind.cs: Make this public in 2.0, and rename from
	previous version.

	* Win32RegistryApi.cs: Include version to check for version;
	Eliminate old internal enum, and instead use the new 2.0 enum.

	* UnixRegistryApi.cs: Add support for typed versions of values.

	Add support for ExpandString.

	* Registry.cs (SetValue): implement version with type arguments.

svn path=/trunk/mcs/; revision=63708