PagesConfigPanel.cpp: add enumhelp for infobox sets
PythonGlue: only add release time if it's plausible
PythonGlue: throw exception if igc file can't be opened
IGCFixEnhanced: fix compatibility with gcc 4.6
PythonConverters: write event location into 'location' item
AnalyseFlight: use a explicit scoring end time for analysis