Update CoreLocation Extension

Fix compiler order issue

Fix verbose first.

Tag 4.1.8

Silence Swift 3.1-beta warning

Tag 4.1.7

Experiments with `flatMap`

Second attempt at 5.0

Experimental branch; changes follow:

* Fixes zalgo issues by always executing after at least one execution context
* Removes zalgo/waldo in favor of `nil` queue as per NSNotificationCenter etc.
* True zalgo behavior as per PMK<5 is now impossible (fix welcome) because even fulfill/reject must wait for the current execution context to expire
* All promise handlers take a Chainable return type now, reducing duplication and much reducing compiler mis-errors from Swift. Also making us basically more flexible. Ish. Because we now have to have a protocol extension for every type that can be implicitly returned. Sigh.
* Reduced duplication in AnyPromise/Promise by making core code a Mixin
* Error-Unhandler is temporarily removed, with Swift code it will *stay* removed as Swift is strict and Promise is strict and you get a warning if you don’t handle your error with Swift and if you ignore the warning you are asking for trouble. Instead always terminate your chains! We can’t be as strict in Objc and well, that’s why we like objc, so…
* Promise can no longer be derived. Which makes sense IMO.