added brush distance widget
add mixin for brush
add common initializer
HollowCircle uses asBrush mixin
HollowSquare uses asBrush mixin
PencilBrush uses mixin
Rect uses asBrush mixin
SprayBrush uses asBrush mixin
clean comments
Merge branch 'feature-brush-mixin' into feature-brushDistanceWidget
wrap mixin in a closure
rectOutline uses mixin
circleOutline uses mixin
lineOutline uses mixin
draft for brush distance widget
zero as the default distance
attach event handler
track outerpoint
brush distance works for brush painting
just realised that distance feature should not be applied to painting object