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)

connectivity/connectivity.android.ts

@@ -1,5 +1,5 @@
 import appModule = require("application");
-import common = require("connectivity/connectivity-common");
+import common = require("./connectivity-common");
 import utils = require("utils/utils");
 
 global.moduleMerge(common, exports);
@@ -46,4 +46,4 @@ export function startMonitoring(connectionTypeChangedCallback: (newConnectionTyp
 
 export function stopMonitoring(): void {
     appModule.android.unregisterBroadcastReceiver(android.net.ConnectivityManager.CONNECTIVITY_ACTION);
-}
+}

connectivity/connectivity.ios.ts

@@ -1,4 +1,4 @@
-import common = require("connectivity/connectivity-common");
+import common = require("./connectivity-common");
 
 global.moduleMerge(common, exports);
 
@@ -84,4 +84,4 @@ export function stopMonitoring(): void {
         _monitorReachabilityRef = undefined;
         _connectionTypeChangedCallback = undefined;;
     }
-}
+}