Automatic translations update from Transifex
https://www.transifex.com/projects/p/vatsinator/
Use DecisionEvent in case of data fetch error
Merge branch 'develop' of https://github.com/Vatsinator/Vatsinator into develop
Load cached data only if databases are already initialized
Add properties do VatsimDataHandler
Use spatial::equal_range to get items from the map
Merge branch 'develop' of https://github.com/Vatsinator/Vatsinator into develop
Added UserInterface::ensureMainWindowIsActive()
Automatic translations update from Transifex
https://www.transifex.com/projects/p/vatsinator/
Zoom smoothly
Fix MapScene updating items
Merge branch 'develop' of https://github.com/Vatsinator/Vatsinator into develop
Cleanup
Added extra gcc flags to debug builds
Doc update; refactor
Added Doxyfile
Merge branch 'develop' into ports/android

Conflicts:
	source/modules/vatbookhandler.cpp
	source/network/filedownloader.cpp
	source/network/filedownloader.h
	source/network/plaintextdownloader.cpp
	source/network/plaintextdownloader.h
	source/storage/cachefile.cpp
	source/storage/filemanager.cpp
	source/storage/settingsmanager.cpp
	source/ui/map/airportitem.cpp
	source/ui/map/flightitem.cpp
	source/ui/map/maprenderer.cpp
	source/ui/map/maprenderer.h
	source/vatsimdata/vatsimdatahandler.cpp
	source/vatsinatorapplication.cpp
	source/vatsinatorapplication.h