Added hack to allow extendWeaving to not try to return a value from a method that doesn't return a value.
Corrected closure factory name generation for interfaces.
Merge branch 'master' of /documents/projects/github/Weaver

* 'master' of /documents/projects/github/Weaver:
  Added hack to allow extendWeaving to not try to return a value from a method that doesn't return a value.
  Allow constructor reflection to be null.

Conflicts:
	src/Weaver/ExtendWeaveMethod.php