Show Prerelease packages if no official release is available

[JustinBeckwith]

WebMatrix by default does not surface pre-release packages. In the case of early previews of existing products, this is fine. However with products that haven't achieved 1.0 (see SignalR) this makes installation troublesome. It would be nice to have the API return only pre-release packages for items that don't have an official 1.0 release.

[ghost]

Hey Tim, don't close the bug until you have merged your fix into Preview or Master.

[ghost]

why is this bug closed? It's not fixed yet.

[TimLovellSmith]

Sorry, this was accidentally closed due to a moment of dyslexia on my part. [Confused the issue with 657.]

[jeffhandley]

Re-opening since that commit has the wrong issue number in it.

[analogrelay]

Reopening because the mis-named commit got re-pushed

[analogrelay]

Again, the commit got re-pushed and it closed the issue :). Reopening.

[TimLovellSmith]

This initially sounds like a request for webmatrix extension client to me. Unless someone has checked it is actually an issue in the curated feed the client is pulling down?

[analogrelay]

The WebMatrix specific work is done. And I think that we don't actually want to show Pre-Release packages when the user has selected Stable Only. Won't Fix