Safelog Pilot Logbook

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* Minor bug fixes
* Support for more airline/roster import sources
* New derived fields allow for even more ways to analyze your logbook, including allowing you to generate output in EASA/FAA/TC/CASA Australia/UK CAA/many more formats regardless of your 'native' format.
* Updated airport, aircraft, aircraft type, etc databases
* User Interface improvements, including better file/picture/signature selection
* Many small changes under the hood to keep us the #1 Pilot Log.