2008-01-14  Jb Evain  <jbevain@novell.com>

	* Expression.cs: MakeUnary is expected to call the appropriate
	factory methods.

2008-01-14  Miguel de Icaza  <miguel@novell.com>

	* Expression.cs (Constant, MakeBinary and consumers of it): Some
	more fill-up changes.

	MakeBinary will need much more work to support user-provided
	types. 

2008-01-13  Jb Evain  <jbevain@novell.com>

	* *.cs: fresh implementation.