* Fixed minor lint error.
* Added documentation for this builder in `triton.html.md`.
* Added (and updated) the needed Joyent Triton Cloud API Go libraries
to `vendor.json`.
This is a builder for Joyent's Triton system. It was originally at
jen20/packer-builder-triton, and subsequently at
joyent/packer-builder-triton on GitHub. The following commit vendors the
dependencies.