Manpages of src:cadabra2 in Debian experimental

• cadabra-server(1)
• cadabra2-cli(1)
• cadabra2-gtk(1)
• cadabra2(1)
• cadabra2cadabra(1)
• cadabra2html(1)
• cadabra2ipynb(1)
• cadabra2latex(1)
• cadabra2python(1)