This commit implements the result view and template.
- fix Python3 configparser interpolation error in portfolio.ini
- debianmemberportfolio.model.urlbuilder ported to Python3
- add showurls.html as a direct Jinja port of showurls.mako
- implement functionality in debianmemberportfolio.views.result
- change all references from ddportfolio to debianmemberportfolio
- rename debianmemberportfolio.controllers.DDPortfolioController to
debianmemberportfolio.controllers.Controller
- update documentation
- update copyright years, unify file header formatting