Support Emissary Bundles (v0.3.0-alpha)

Note: We now use .asc instead of .sig files to make verification easier. It is way easier for me to automate stuff using the .asc format.

Emissary Bundles are the hot new thing. I don't like configuring Emissary. You don't like configuring Emissary. We fixed it with the Emissary Bundle.

A Drawbridge admin can click a button to generate an Emissary bundle for a specific machine. It contains the encryption key(s), certificate, and Drawbridge address info alongside the latest Emissary client, so your fleet of machines can connect with no requirement to move files around.

I know, right?

Enjoy! A Drawbridge release to support this will be released soon.

Other notes:
GitHub doesn't count releases as "Releases" if you check the "Set as a pre-release button" during the creation of a new release.

So this release won't be published like that, so Drawbridge can grab the latest release via the GitHub API.