Little improvements and documenting in OpCodeParser class.
Little improvements and documenting in TemplateControlHelper class.
Replaced null exception message used as a stub.
Fixed problem with ResolveMethod.

The process of token resolution is much easier than I thought it is. No type
inheritance lookup was required. (Thanks to Albahari once again.)
Added unit tests for PropertyHelper and TemplateControlHelper.
Some improvements were made in order to make the tests run.