Super minimal alternative Webxdc storefront

[ian]

I would like to propose the following as an alternative:

Annotation for webxdc categories and labels

We could add further structured metadata items to the manifest of each app. It could be either stored in the original zip, or separately by the store. The store web app frontend could provide filters for these metadata. Combinations of filters should be invoked by deep linking using the URL fragment (URI anchor). Some of these may be mutually exclusive categories, while others may be overlapping tags. Most of these could be fairly objective, while others would be somewhat subjective (small vs. l…