Jh/release 2.0 associations

[jhollinger]

Switches from object/collection to the more familiar association with [MyBlueprint] to denote collections. I'm tempted to go this route since it's more similar to V1 without giving up anything.

association :widget, WidgetBlueprint
association :parts, [PartBlueprint]

view :extended do
  # but is this too ugly?
  association :parts, [PartBlueprint[:extended]]
end

[jhollinger]

Fixing Rubocop issues after merge