Move to secure defaults for tunnels

Changelog for 0.8.0:

Commits
8bb18ec Move to secure defaults by @alexellis
5a86ccd Move provision package out of repo by @alexellis
5837987 Fix download script by @alexellis
45b3698 Update feature list by @alexellis
55fc7bd Update README.md by @alexellis
a301323 Update README.md by @alexellis

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