* Fixed #import typo in COObjectGraphContext+Debugging.h (was breaking compilation)

* Extracted COEditingContext(Debugging) into a standlone public header


git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@10090 7b3f36aa-e6db-49c1-8b4c-66eac1997e64