IGCFix: Apply() copies extentions, too
python: add FlightPath functionality...

... but without path reduction yet.
python: add small test script
python: add takeoff/release/landing detection method
Flight: make flight reading code it's own method
IGCFixEnhanced: add clock
python: implement polyline reduction code
PythonGlue: Flight.path regards computed fix level
DouglasPeuckerMod: add hard limit for number of points
python: implement flight analysis
python/AnalyseFlight: set limits for OLCTriangle solver
FlightTimes: reset calculated and flying_computer after each flight
python: clean up
DebugReplayVector: process provided terrain elevation
PythonGlue: read flight from python sequences

Will be used to analyse tracking flights or flights with added terrain elevation.
PythonGlue: Flight.path outputs terrain elevation, too
python: implement google polyline encoding
PythonGlue: add encode method to flight object

The fast lane to create a encoded flight dictionary
PythonGlue: don't DECREF a None value
AnalyseFlight: add wind output