Update README.markdown

Update doc to specify Jetty.apply(8080) instead of Jetty.main(8080) for starting an embedded test server.
Merge pull request #12 from balshor/patch-1

Update README.markdown
Tick to scala 2.10.4.
Merge branch 'master' into stable

* master:
  Tick to scala 2.10.4.
  Update README.markdown