In order to keep all three packages (zulip, zulip_bots,
zulip_botserver) in the same repo, all package files must now
be nested one level deeper.
For instance, python-zulip-api/zulip_bots/zulip_bots/bots/, instead
of python-zulip-api/zulip_bots/bots/.
This adds support for controlling the basic configuration (user, API
key, etc.) of the Zulip API bindings via environment variables.
Fixes#3364.
Tweaked by tabbott to update variable names and document in README.md.
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
