Builder does not support super class fields

[kristofdepypere]

If you generate a Builder that extends a class, it is not possible to select the fields of the super class. Also suppose the super class does not have a default constructor and has final fields, the Builder will generate a private constructor that is not valid for the class.

I think adding support for super classes will make this plugin a lot better.

[analytically]

Fixed, new release will get pushed this week.