HTTP API

I've been thinking lately that it'd be great if we exposed a simple HTTP API to query directly our ClojureDocs EDN export. This would simplify the lives of clients a lot, as they won't have to deal with keeping a local copy of the data and will be able to fetch some data even without Orchard or cider-nrepl.

I guess the simplest API would be - clients request the docs for a symbol and get everything we have about it. A more polished API would allow for clients to specify they want only part of the data for some symbol (e.g. `:see-alsos`). @liquidz What do you think?

No files, tests, or entry points are named. Start by reviewing the repository contents and the unresolved issue discussion to identify how the EDN export is produced and where an HTTP service could fit. Done would mean agreeing on and implementing a queryable API for symbol documentation, including whether partial data such as :see-alsos is supported.

Written by the indexing model from the issue text.