fixtures: add "Inspire Themes" namespace.
models: add wrapper for inspire-themes concepts.
views: add inspire-themes view based on themes view.
urls: add url rule for inspire-themes view.
layout: insert inspire-themes in site menu.
inspire-themes: implement redirect for old url.
inspire-themes: use themes template.
inspire-theme: create detail view and template for inspire theme.
inspire-theme: add redirect for single inspire theme view.
redirect: replace hardcoded values with computed ones.
fixtures: add inspire-theme namespace to testing fixture.