More customizations
Rename EdgeStyler -> EdgeRenderer (part 1)
Rename EdgeStyler -> EdgeRenderer (part 2)
Refactor DotBuilder
Rename DotBuilder -> GraphBuilder (part 1)
Rename DotBuilder -> GraphBuilder (part 2)
Rename AbstractDepGraphMojo -> AbstractGraphMojo (part 1)
Rename AbstractDepGraphMojo -> AbstractGraphMojo (part 2)