Basic client for Project Gemini

usage: explore.py [-h] [-p PORT] [-i ID] [-o FILE] [-O] [-v] url

positional arguments:
  url                   gemini:// URL

optional arguments:
  -h, --help            show this help message and exit
  -p PORT, --port PORT  Override default port 1965
  -i ID, --identity ID  Client certificate file (.pem)
  -o FILE, --output FILE
                        Output file name
  -O, --remote-name     Use file name from the URL
  -v, --verbose