Big code cleanup.
Some NATs are now being parsed.
A lot of room to develop this feature yet.
Merge branch 'develop' into feature/route-parser

Conflicts:
	source/vatsimdata/client/pilot.cpp
	source/vatsimdata/client/pilot.h
Merge branch 'develop' into misc/visual-optimizations
Not even worth mentioning.
Further improvements.
- Added class for TableViews;
- ShowAirportButton class renamed to AirportDetailsButton.
Ensuring that bookings view is never NULL.
BookedAtcModel sorting.
Changelog update.
Merge branch 'misc/visual-optimizations' into develop
Changelog update.
Pushing missing files.
Cleanup.
Polish translation update.
TrackAction is now checkable.
FirDetailsWindow improvements.
Changelog update.
Merge branch 'develop' into feature/route-parser
NATs parsing improved.
Changed glColor4d to glColor4f.