Update README to demonstrate unified api where `register-socket!` accepts options map and optionally creates ZeroMQ sockets.
Indent.
Remove easy API fns and make optional socket creation possible within the `register-socket!` function, which now accepts an options map.
Fixup README typos.
Automagically use default-context if none is provided.
More `register-socket!` argument checking.
Merge branch 'unified-api'