Opensoar

Fixed
~~~~~~~~
* IGC files with duplicate fixes no longer cause errors

Changed
~~~~~~~~
* Using timezone aware fixes throughout the library
* Input times are now timezone aware
* Output times are now timezone aware

Removed
~~~~~~~~~
* Several time helper functions `utilities.helper_functions`

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Fixed
~~~~~~~~
* Fixed starttime UTC correction with negative timezone values

------------------------
Fixed
~~~~~~~~
* allow for soaringspot files without task info
* allow for soaring competitors with empty competition ID

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Added
~~~~~~
* extra geojson serializer for trip
Fixed
~~~~~~~~
* automatic sector orientations should point inward

------------------------
Added
~~~~~~
* geojson serializers
Fixed
~~~~~~~~
* AAT inside sector determination

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Changed
~~~~~~~~
* Replace TravisCI with github actions for automated tests and publish
* Replace pygeodesy with pyproj for speed-up
Removed
~~~~~~~~~
* StreplaDaily support: site no longer online
* `calculate_distance` and `calculate_bearing` (replaced by `calculate_distance_bearing`)
Fixed
~~~~~~~~
* is -> == on literals