[PATCH] Enhancements for the DynTypedNode/DynTypedMatcher system.

[Sean Silva]

  > Enhancements for the DynTypedNode/DynTypedMatcher system.
  > - Added DynNodeType as a standalone way to represent node types and their hierarchy.
  > - Added conversion routines and checks in Matcher<T> that take a DynTypedMatcher.
  > - Fixed MatchFinder::addMatcherDynamic() to validate the input matcher.
  > - Added type information on the error messages for the marshallers.
  > - Allows future work on Polymorphic/overloaded matchers. We should be able to disambiguate at runtime and choose the appropriate overload.


  Could you please split these up into separate patches so that they are easier to review?

http://llvm-reviews.chandlerc.com/D815