[ci skip] remove bower.json version, add npm devDependencies & np publish config

Author: dfreedm

bower.json

@@ -1,6 +1,5 @@
 {
   "name": "polymer",
-  "version": "2.0.0-rc.7",
   "main": [
     "polymer.html"
   ],

package.json

@@ -8,6 +8,8 @@
     "test": "test"
   },
   "devDependencies": {
+    "@webcomponents/shadycss": "^1.0.0-rc.6",
+    "@webcomponents/webcomponentsjs": "^1.0.0-rc.12",
     "babel-preset-babili": "0.0.12",
     "del": "^2.2.1",
     "dom5": "^1.3.1",
@@ -40,5 +42,6 @@
   "bugs": {
     "url": "https://github.com/Polymer/polymer/issues"
   },
-  "homepage": "https://github.com/Polymer/polymer"
+  "homepage": "https://github.com/Polymer/polymer",
+  "publishConfig": {"access": "public"}
 }