Semi-standardize usage of icons in many mission panels
* Question mark: Decision / user input
* Exclamation mark: Tutorial message / information
* Hedgehog: Mission introduction
* -amSkip: Mission failure
* Star: Mission success / end of game
foreach(dir
Fonts
Forts
Graphics
Locale
Maps
Missions
Music
Names
Scripts
Sounds
Themes
misc
)
add_subdirectory(${dir})
endforeach(dir)
if(${GL2})
add_subdirectory(Shaders)
endif(${GL2})