Add cordovaDependencies section to package.json (#1232)

This reflects `engines` elements from plugin manifest to package.json to comply w/ [new plugin fetching model](https://github.com/cordova/cordova-discuss/blob/master/proposals/plugin-version-fetching.md) and corrects `engine`'s value according to [package.json format](https://docs.npmjs.com/files/package.json#engines)

Its also desirable to add 'protective' entry for next major plugin version to protect end-users from fetching edge versions of the plugin by incompatible version of cordova. See corresponding [discussion on mailing list](http://apache.markmail.org/thread/p73loqtvbzvfzsv5) for more details and reasons behind this.

package.json

@@ -29,12 +29,18 @@
     "cordova-wp8",
     "cordova-browser"
   ],
-  "engines": [
-    {
-      "name": "cordova",
-      "version": ">=3.0.0"
+  "engines": {
+    "cordovaDependencies": {
+      "1.8.2": {
+        "cordova": ">=3.6.3",
+        "cordova-android": ">=4.0.0",
+        "cordova-ios": ">=4.1.0"
+      },
+      "2.0.0": {
+        "cordova": ">100"
+      }
     }
-  ],
+  },
   "author": "Adobe PhoneGap Team",
   "license": "APL",
   "scripts": {