removeQuestProgress dialogue reward type. Initiallized the GDEVisitor
class to help with finding dependencies (through the Beanshell console
only for now).
Added support for the new "colorfilter" map property. Due to Java2D
having no correct color filter support, only the "blackXX" values can be
previwed. "bw" and "invert" cannot, the performance cost was simply way
too high.