The previous list order didn't seem to have any reason behind it. This
is a suggestion for new order.
Index (the introduction) is first, followed by the proxy. Then comes
all the official sdks in alphabetic order (punctuation placed before
alpha). At the end of the list is the 'community sdks' link.
I'm open to suggestions and discussion here, but was working on this
list, so thought it could use some love.
This serves two purposes:
1. For people who know the structure, it won't look like anything's
missing
2. For people who don't know the structure, it'll make community sdks
more discoverable.
This page was more or less a duplicate of the final section of the
SDK overview. I've moved the section on implementing your own SDK into
the SDK overview instead.
