Remove website files
Add JMAP over HTTPS section.

Specifies how to make an API request over HTTP. Future extension to the JMAP
spec may add support for different protocols, for example WebSockets.
Add File Upload section to spec.
Use same bullet type for nested unordered lists.

kramdown (jekyll's markdown parser) seems to not recognise a different
bullet type for a nested list if it follows an empty line.
getMailbox: String[] for ids and normalise/simplify text
Autodiscovery - first draft
onlyCountsChanged: fix indent
searchsnippets: fix up response text
message: move hasMoreUpdates to same list position as threads