v0.0.49: Bugfixes

Builds are now made using Go 1.6.

The quickstart wizard no longer tries and fails to install a cronjob if a means
of installation cannot be found.

A bug causing the redirector to fail to launch has been fixed.

In acmeapi, HTTPError is now exported to allow the examination of errors.

The log message severity for a failure to save webroot files is now Info,
which prevents the emission of annoying error messages in cron jobs
when not running as root.