Merge pull request #17 from bonroyage/master

Version 1.1
Merge pull request #18 from vataware/develop

Public release of version 1.1
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
Merge commit '567dfa6b55b7b270bb523b2ab26df6ea9fe9897c'
Cache mods