Turned on all Mem. Manage. run diagnostics for P-001

* Turned on all 4 Memory Management Diagnostics (Scribble, Guard Edges, Guard Malloc, Zombie Objects) for the P-001.G-imr scheme's Run/Launch action.
Minor: AppDelegate import no longer needed in main.m

* Since main.m now uses the classfor() macro (which turns its argument into a C string and feeds it into objc_getRequiredClass/objc_getClass), it no longer needs to #import AppDelegate.  Changed to a forward declaration.
	» It may be strange to take a class name, convert it to a string, then to a Class object, then back to an NSString, and eventually (inside UIApplicationMain) to a Class again.  If UIApplicationMain would take a Class, that would solve most of this.
	» And the initial conversion ensures that we have the next-best thing to a complier error— a hard-and-fast _objc_fatal/trap if the arg to objc_getRequiredClass doesn't exist.
Fixed off indentation in doc comments

* Fixed off indentation in doc comments where instead of `///«space»…` there was `///«tab»…`.
	» Have I mentioned how much I loathe Xcode?