0.0.19
797e41e - bump version to 0.0.19 (Kalle)
943ab7c - improvement: better GUI height/width (Kalle)
84b21ba - fix: improve loading and saving data (Kalle)
f39886f - improvement: redesigned configuration structure (Kalle)
cc2dd03 - draft: ChallengeBuilder (Kalle)
c89a02b - draft: add ChallengeBuilder static website (Kalle)