refactor(facade): use rxjs package

move to new RxJS distribution.

BREAKING CHANGE:

RxJS imports now are via `rxjs` instead of `@reactivex/rxjs`
Individual operators can be imported `import 'rxjs/operators/map'`

modules/angular2_material/package.json

@@ -9,7 +9,7 @@
   "repository": <%= JSON.stringify(packageJson.repository) %>,
   "dependencies": {
     "angular2": "<%= packageJson.version %>",
-    "@reactivex/rxjs": "<%= packageJson.dependencies['@reactivex/rxjs'] %>",
+    "rxjs": "<%= packageJson.dependencies['rxjs'] %>",
     "zone.js": "<%= packageJson.dependencies['zone.js'] %>"
   },
   "devDependencies": <%= JSON.stringify(packageJson.defaultDevDependencies) %>