for the extremely pedantic and visually abled

... who can distinguish between transparency levels 18 and 20 (as shown
in the legend)
the AI should not be allowed to know whether the player is a novice and/or developer
renamed PreRules to Options
some further reasonable renames
Merge pull request #129 from jvoigtlaender/opacity

for the extremely pedantic and visually abled
Merge pull request #130 from jvoigtlaender/rules-refactoring

the AI should not be allowed to know whether the player is a novice and/or developer