message: npm install the js-sdk
  otherwise we don't have uglifyjs
diff: @@ -13,7 +13,7 @@ set -x
  npm install
  # we may be using a dev branch of js-sdk in which case we need to build it
  -(cd node_modules/matrix-js-sdk && npm run build)
  +(cd node_modules/matrix-js-sdk && npm install)
  # run the mocha tests
  npm run test
  