The --insecure option ("insecure=true" in .zuliprc) disables
verification entirely, similar to other tools like curl.
The --cert_bundle ("cert_bundle=<file>" in .zuliprc) allows
a file to be specified containing the CA certificates to verify
against.
When using self-signed certificates, the server's public key
can be used as the only cerificate in the file.
This change incidentally fixes an issue where the "site" parameter
in .zuliprc was ignored when specifying --user and --api-key on
the command line.
Fixes: #104
New users will no longer get desktop and audible notifications for all streams
by default.
This also updates the `day1` follow-up email to let users know they can
customize how and when Zulip notifies them of new messages.
Lastly, this adds a `changelog.md` file, following the conventions from
keepachangelog.com, to track changes for new releases.
Tim Abbott
Shane Kearns
Nicholas Bergson-Shilcock