This commit fixes some things with the Vagrant Cloud API docs:
* All POST calls did not explicitly specify POST.
* The /api/v1/two-factor/request-code call did not have the correct URL
in the cURL example.
* I've also standardized the parameter order on all of the requests in
the cURL example (method comes first) and also made a few style
changes such as consistent interpolation of variable references.
Fixes various capitalizations in the docs
* Ex: VMware, Linux/Unix, PowerShell, some abbreviations
Also, Prettier auto-formatted away some trailing spaces.
