Spur: add known classes to class table
Spur: add known classes to class table

sebastianconcept/SqueakJS,Speed-Pad/online,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,bertfreudenberg/SqueakJS,sebastianconcept/SqueakJS,bertfreudenberg/SqueakJS,sebastianconcept/SqueakJS,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,Speed-Pad/online,Speed-Pad/online,bertfreudenberg/SqueakJS,bertfreudenberg/SqueakJS,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io