add Maps and BigDecimals to opaque types to avoid generation of docs for these
fix missing consideration of  typesToTreatAsOpaque as option so that it can be used from maven pom
fixed that alsways the first type parameter of a generic type is used and all other not considerated (e.g. Maps)
Add very simple support for running the swagger doclet in Maven-Multi-Module projects. To generate a complete API make sure that every maven module writes it's swagger output in the same directory. The plugin will the generate a services.json file which contains links to all available APIs.