Voyager

Sean's SFML (s)Fix

In build/src/voyager-{server/client}/CMakeFiles/voyager-client.dir/link.txt change the two instances of -lsfml to ../../ext/sfml/lib/libsfml-audio.a ../../ext/sfml/lib/libsfml-graphics.a ../../ext/sfml/lib/libsfml-network.a ../../ext/sfml/lib/libsfml-system.a ../../ext/sfml/lib/libsfml-window.a