* CodeGen.cs: Add methods for adding data. CodeGen now takes a

    * CodeGen.cs: Add methods for adding data. CodeGen now takes a
	report object for giving users errors/warnings/info.
	* FieldDef.cs: When a data constant is assigned to a field the
	constant might not exist yet. So just take the constants name and
	look it up when writting code.
	* Local.cs: Starting to add some error handling. Still playing
	with diff ways to do this.
	* MethodDef.cs: Add some error handling for local var lookups
	* TypeDef.cs: Data is allways global so it should never be added
	to a class
	* TypeRef.cs: Error message for lookups.

svn path=/trunk/mcs/; revision=18259