Make "npm test" run Karma tests

Result is this:

```
$ npm test

> docker-registry-frontend@0.0.2 pretest /Users/marca/dev/git-repos/docker-registry-frontend_2
> npm install

> docker-registry-frontend@0.0.2 postinstall /Users/marca/dev/git-repos/docker-registry-frontend_2
> bower install

> docker-registry-frontend@0.0.2 test /Users/marca/dev/git-repos/docker-registry-frontend_2
> karma start test/karma.conf.js

09 07 2016 13:36:20.771:WARN [karma]: No captured browser, open http://localhost:8080/
09 07 2016 13:36:20.781:INFO [karma]: Karma v1.1.1 server started at http://localhost:8080/
09 07 2016 13:36:20.782:INFO [launcher]: Launching browser PhantomJS with unlimited concurrency
09 07 2016 13:36:20.788:INFO [launcher]: Starting browser PhantomJS
09 07 2016 13:36:21.250:INFO [PhantomJS 2.1.1 (Mac OS X 0.0.0)]: Connected on socket /#Z4MF21dfMgThOi3zAAAA with id 9538616
PhantomJS 2.1.1 (Mac OS X 0.0.0) Controller: MainCtrl should attach a list of awesomeThings to the scope FAILED
	forEach@bower_components/angular/angular.js:326:24
	loadModules@bower_components/angular/angular.js:4115:12
	createInjector@bower_components/angular/angular.js:4041:22
	workFn@bower_components/angular-mocks/angular-mocks.js:2464:60
	loaded@http://localhost:8080/context.js:151:17
	bower_components/angular/angular.js:4155:53
	TypeError: undefined is not an object (evaluating 'scope.awesomeThings') in test/spec/controllers/main.js (line 20)
	test/spec/controllers/main.js:20:17
	loaded@http://localhost:8080/context.js:151:17
PhantomJS 2.1.1 (Mac OS X 0.0.0): Executed 1 of 1 (1 FAILED) ERROR (0.005 secs / 0.006 secs)
```

Fixes #139

package.json

@@ -27,15 +27,24 @@
     "grunt-svgmin": "^3.1.2",
     "grunt-usemin": "^3.1.1",
     "grunt-wiredep": "^2.0.0",
+    "jasmine": "^2.4.1",
+    "jasmine-core": "^2.4.1",
     "jshint-stylish": "^2.1.0",
+    "karma": "^1.1.1",
+    "karma-jasmine": "^1.0.2",
+    "karma-phantomjs-launcher": "^1.0.1",
     "load-grunt-tasks": "^3.4.0",
     "time-grunt": "^1.3.0"
   },
   "engines": {
     "node": ">=0.10.0"
   },
   "scripts": {
-    "test": "grunt test"
+    "postinstall": "bower install",
+
+    "pretest": "npm install",
+    "test": "karma start test/karma.conf.js",
+    "test-single-run": "karma start test/karma.conf.js --single-run"
   },
   "description": "A pure web-based frontend to a docker-registry",
   "main": "Gruntfile.js",

test/karma.conf.js

@@ -26,8 +26,7 @@ module.exports = function(config) {
       'bower_components/angular-route/angular-route.js',
       'bower_components/angular-sanitize/angular-sanitize.js',
       'bower_components/angular-touch/angular-touch.js',
-      'app/scripts/**/*.js',
-      'test/mock/**/*.js',
+      'app/**/*.js',
       'test/spec/**/*.js'
     ],