I shouldn't need to specify _self on the properties in _search

(Bug, To be Fixed , Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Search, Functions
Summary: It's just plain annoying, and the source of mysterious bugs.
Fixing this by adding _identityThing, and the new IdentityContext, so that functions like _search have a straightforward way to process the Properties and not evaluate them.