Clean up main template (remove unused imports)
Fixup jsRoutes commented w/o requirejs
Mv main.js from app/assets to public/javascripts
Remove unused assets
Support stage/dist: de-require.js jsRoutes, add shim config to build.sbt
Move decodeBody from ProductSearch to ShopScrapingDescription

The ShopScrapingDescription knows the encoding, so it should happen there,
and the Shop.search interface is cleaner now.