FeedAPI E-Parser Demo

Commit #261758 by neclimdul at 16:53
FeedAPI Extensible Parser: /modules/feedapi_eparser/feedapi_eparser.module 1.28
FeedAPI Extensible Parser: /modules/feedapi_eparser/plugins/FeedapiEparserTypePlugin.inc 1.8
Split parse into parse/fetch functions.

Parse is really trying to do to many things. This new approach provides
a fetch function that wraps the caching, and download/parse fail logic.
This should give us a lot more mileage.