About page is out of date

[scottgonzalez]

It contains gems like:

The second is docs.jquery.com, that erstwhile chestnut still living out its final days before it will be shut down in early 2013.

Also, regardless of the current state, we should drop the beta section and accompanying banner.

[arthurvr]

Maybe we could include a section explaining our long-term plans with the learn site? We had a discussion about it in the meeting. (cc: @AurelioDeRosa @RedWolves)

[AurelioDeRosa]

Sure! I think we can combine the info of the blog post I prepared with the general plan described by @agcolom's document and related documents.

[Krinkle]

Mention of beta removed in #707.
Mention of docs.jquery.com updated in c5962fd.