Presenter now starts a proxy server to the backend API on its own.

This updates Spring, Netty-socketio and additional libraries to their
latest patch releases.

Use JaCoCo instead of Cobertura and remove obsolete Sunfire excludes.

This updates Spring, Logging and Netty-socketio. The new Netty-socketio
version fixes memory leaks and disables SSL3 encryption (POODLE
vulnerability).

Netty-socketio 1.7.3 fixes memory leaks.

Fixes memory leak in netty-socketio.

* Do not include Mobile in WAR
* Deploy frontends and customization to their own contexts in dev env
* Update Connector and Jetty dependencies

This includes usage of newest connector-client. The last maven based
version 0.41.0 had been replaced by newer 0.7x version wich includes some
new features.