No more ambient modules for tns-core-modules/* subpackages.

- Use path mappings in tsconfig.json to resolve module typings
- Only use ambient mobules for global API's
- Move single-file modules to a subdir with the same name so that
we can provide a hand-written typing next to it (via package.json)
- Delete all mentions of tns-core-modules.d.ts
- Delete reference d.ts assembly build steps. Not needed anymore.
- HACK! Use a <reference> for global typings in application.d.ts
to avoid publishing a separate @types/tns-core-modules package.
- Rename declarations.d.ts to tns-core-modules.d.ts to preserve
JS project mappings in references.d.ts (the only place we use those)

tns-core-modules/connectivity/connectivity.d.ts

@@ -1,42 +1,40 @@
 /**
  * Contains connectivity utility methods.
  */
-declare module "connectivity" {
+/**
+ * Gets the type of connection.
+ * Returns a value from the connectivity.connectionType enumeration.
+ * To use this method on Android you need to have the android.permission.ACCESS_NETWORK_STATE permission added to the AndroidManifest.xml file.
+ */
+export function getConnectionType(): number;
+
+/**
+ * Defines the different connection types.
+ */
+export const enum connectionType {
     /**
-     * Gets the type of connection.
-     * Returns a value from the connectivity.connectionType enumeration.
-     * To use this method on Android you need to have the android.permission.ACCESS_NETWORK_STATE permission added to the AndroidManifest.xml file.
+     * Denotes no connection.
      */
-    export function getConnectionType(): number;
+    none = 0,
 
     /**
-     * Defines the different connection types.
+     * Denotes a WiFi connection.
      */
-    export const enum connectionType {
-        /**
-         * Denotes no connection.
-         */
-        none = 0,
-
-        /**
-         * Denotes a WiFi connection.
-         */
-        wifi = 1,
-
-        /**
-         * Denotes a mobile connection, i.e. cellular network or WAN
-         */
-        mobile = 2
-    }
+    wifi = 1,
 
     /**
-     * Starts monitoring the connection type.
-     * @param connectionChangedCallback A function that will be called when the connection type changes.
+     * Denotes a mobile connection, i.e. cellular network or WAN
      */
-    export function startMonitoring(connectionTypeChangedCallback: (newConnectionType: number) => void): void;
+    mobile = 2
+}
 
-    /**
-     * Stops monitoring the connection type.
-     */
-    export function stopMonitoring(): void;
-}
+/**
+ * Starts monitoring the connection type.
+ * @param connectionChangedCallback A function that will be called when the connection type changes.
+ */
+export function startMonitoring(connectionTypeChangedCallback: (newConnectionType: number) => void): void;
+
+/**
+ * Stops monitoring the connection type.
+ */
+export function stopMonitoring(): void;

tns-core-modules/connectivity/package.json

@@ -1,5 +1,6 @@
 {
-	"name" : "connectivity",
-	"main" : "connectivity",
-	"nativescript": {}
+  "name" : "connectivity",
+  "main" : "connectivity",
+  "types": "connectivity.d.ts",
+  "nativescript": {}
 }