PythonGlue: output analysis result as python dict
PythonGlue: don't decrease reference counter of argument objects
AnalyseFlight: replay starts at takeoff time

Prepare adding the flight phase detector
AnalyseFlight: add flight phase detector
PythonConverters: uninline BrokenDateTime conversion
PythonConverters: convert flight phases to python objects
PythonGlue: add begin and end options for Path()
test_XCSoarTools.py: output fixes from takeoff to release