updating the main module to scala 2.11
backend on google appengine

Both frontend and backend are now hosted at google app engine. Backend is `http://java.spsc.appspot.com/run`.
project structure simplification

old spsc_web (hosted at staxapps) is replaced by new spsc_web (hosted at appengine)
setting timeout for touching backend to 30 sec

The default timeout is 5 sec, which is not enough for waking up hibernated backend. 30 sec seems to be OK.
follow_redirects=False for internal requests

since backend is hosted at app engine
Merge pull request #1 from spsc/update

Update