Reduced polling frequency

As per the recommendations on http://www.hoppie.nl/acars/system/tech.html, the polling frequency has been reduced from 1 per second to 1 per minute, randomized to +/- 15 seconds. This is necessary to avoid excessive server load.

As a result, ACARS and CPDLC messages from the Hoppie network may take up to 75 seconds (plus HTTP latencies) to arrive; this, however, is actually realistic.

Please install this update to help keep the Hoppie network accessible for all.

0.3.0: Autostart now follows Swift server

• Avoid hard crashes when error handlers throw.
• Autostart feature now follows Swift server availability instead of starting the plugin immediately on FG startup. This avoids sending messages to the Hoppie network when flying offline.

0.2.0

Change name of global object to hoppieAcars, to avoid name clashes with other ACARS systems in Nasal.

0.1.0

Restructuring and bugfixes