chore(package.json): kick-off 1.5 branch

Author: petebacondarwin

package.json

@@ -1,9 +1,9 @@
 {
   "name": "angularjs",
   "license": "MIT",
-  "branchVersion": "^1.4.0-beta.0",
-  "branchPattern": "1.4.*",
-  "distTag": "latest",
+  "branchVersion": "^1.5.0-beta.0",
+  "branchPattern": "1.5.*",
+  "distTag": "beta",
   "repository": {
     "type": "git",
     "url": "https://github.com/angular/angular.js.git"