Stripped down PurchaseApp. Explorable purchases dataset.

This Flowlet reads events from a Stream and parses them ~~as sentences of the form &lt;pre>&lt;name> bought &lt;n> &lt;items> for $&lt;price>&lt;/pre>~~. The event is then converted into a Purchase object and stored in a Dataset. ~~If the event does not have this form, it is dropped.~~