Send request data as JSON
Remove multiple-switches.md

This is not the right place for this type of TODO/future research-type document.
Merge pull request #328 from henn/remove-extra-doc

Remove multiple-switches.md
Proper checking of arguments re: #333

In lieu of a proper solution to issue #333, we should at least check
the arguments up front and fail cleanly in the unsupported case.

This patch adds said argument checking, along with a test.
Merge pull request #335 from zenhack/headnode_connect_network-check-allocated-status

Proper checking of arguments re: #333
Merge pull request #325 from gsilvis/cli-json-new

Send request data as JSON