[PATCH] Resubmit "Refactor DynTypedMatcher into a value type class, just like Matcher<T>."

[Samuel Benzaquen]

  Added rnk to confirm that this patch works on MSVC.
  The proposed fix is to move the template definition of TypedMatcherStorage after DynTypedMatcher is fully declared.

http://llvm-reviews.chandlerc.com/D2005