Fix: Use the current object store in the RKManagedObjectLoader when looking for cached objects.
Fix build setting architecture to standard.
Fix crash when requests timeout and their delegates go away.

The issue here is that when the request times out, it doesn't get removed from the queue, so the request spawns again. This is ok in most circumstances, but if the delegate making the request goes away, it will result in a crash.
Merge branch 'master' of git://github.com/RestKit/RestKit

Conflicts:
	RestKit.xcodeproj/project.pbxproj