Starting AsTeRICS Ergo twice starts two instances

[deinhofer]

Problem

When double clicking the AsTeRICS Ergo icon twice, two intances of the ARE are started. The second instance won't be able to register the ports for the ACS connection and the webservices and also won't be able to open the FS20 device. The web client should still work because it should continue to communicate with the first instance.
Nevertheless, not all consequences are clear and as the ARE conceptually works as a server, there should only be one instance per application.

Solution
Maybe this should be fixed in the AsTERICS master branch. Either in the Java part or in the start script.
Several variants might be interesting:

1. Show an error message and stop second instance again
2. Connect to first instance, hand over autostart model and close second instance silently
3. Detect if other instance is running and close second instance silently.
4. Create two start links:
   a) Start Asterics Ergo Server
   b) Start Asterics Ergo Webpage