Advise developers on the dangers of disabling SSL/TLS verification

[moggers87]

The verify_requests option on the PyPump object should really only be used for debugging. We should warn developers against making this option available to end-users (fingerprint-pinning is a better option for users using self-signed certs).

I suggest we add something like this:

Unfortunately, we don't have a license to use that image ;)

[moggers87]

Just to be clear: this is for the documentation.