Test output now shows the module name left-aligned so you can easily
browse to see what modules have what tests and know what module a
failing test is coming from.
SFML convention is to only use "" includes when the header is in
the same directory as the file including it. Because these test
util headers are in a separate directory, it makes more sense to
include them via <>.
Similar to sf::Time, sf::Angle provides a typesafe API for working
with angles and provides named functions for converting to and from
degrees and radians.
