chore(tests): use angular installed via npm

- Avoid maintaining / copying AngularJS source code on our repo.
- Ensures that Travis checks out the latest Angular version and tests
  against it.

karma.conf.js

@@ -16,8 +16,8 @@ module.exports = function(config) {
     // list of files / patterns to load in the browser
     files: [
       'misc/test-lib/jquery-1.8.2.min.js',
-      'misc/test-lib/angular.js',
-      'misc/test-lib/angular-mocks.js',
+      'node_modules/angular/angular.js',
+      'node_modules/angular-mocks/angular-mocks.js',
       'misc/test-lib/helpers.js',
       'src/**/*.js',
       'template/**/*.js'

package.json

@@ -9,6 +9,8 @@
     "url": "https://github.com/angular-ui/bootstrap.git"
   },
   "devDependencies": {
+    "angular": "^1.3.15",
+    "angular-mocks": "^1.3.15",
     "grunt": "^0.4.5",
     "grunt-contrib-concat": "^0.5.1",
     "grunt-contrib-copy": "^0.8.0",