Change from "classic" TS 1.6 imports to the default resolution scheme.

- Use relative imports in place of most of our absolute ones.
- Add "private" ambient modules for modules that we need to import using
an absolute path (e.g. when app/.../test-something.ts needs to import
ui/styling/style-scope)

location/location.ios.ts

@@ -1,6 +1,6 @@
 import enums = require("ui/enums");
 import locationModule = require("location");
-import common = require("location/location-common");
+import common = require("./location-common");
 
 global.moduleMerge(common, exports);
 
@@ -175,4 +175,4 @@ export class iOSLocationManager implements locationModule.iOSLocationManager {
 	constructor(manager: CLLocationManager) {
 		this._manager = manager;
 	}
-}
+}