add citest-jasmine npm script, use it circle test

Author: etpinard

circle.yml

@@ -23,3 +23,4 @@ test:
   override:
     - docker run -d --name myimageserver -v $PWD:/var/www/streambed/image_server/plotly.js -p 9010:9010 plotly/imageserver:0.2.1; sleep 10
     - sudo lxc-attach -n "$(docker inspect --format '{{.Id}}' myimageserver)" -- bash -c "cd /var/www/streambed/image_server/plotly.js && node test/image/compare_pixels_test.js"
+    - npm run citest-jasmine

package.json

@@ -50,6 +50,7 @@
     "watch": "node tasks/watch_plotly.js",
     "lint": "cd src && jshint . || true",
     "test-jasmine": "karma start test/jasmine/karma.conf.js",
+    "citest-jasmine": "karma start test/jasmine/karma.ciconf.js",
     "test-image": "./tasks/test_image.sh",
     "test": "npm run test-jasmine && npm test-image",
     "start-test_dashboard": "node devtools/test_dashboard/server.js",