Only check arrived at filed airport
Increase fidelity in proximity()

Only checks for "closest facility" if no $expects ICAO passed to
proximity function.
Typo
Merge pull request #19 from yectep/ytdev

Datafeed mods for proximity
Bugfixes
Merge pull request #20 from yectep/ytdev

Bugfixes from previous
Merge pull request #21 from vataware/develop

Develop to master