Implemented verify / ignore verifying SSL certificate.

Examples:

server = pycouchdb.Server("https://127.0.0.1:6984", verify=False) # ignore verification
server = pycouchdb.Server("https://127.0.0.1:6984", verify=True) # verify
server = pycouchdb.Server("https://127.0.0.1:6984") # ignore verification
Update docstrings for last changes.