Convert bigclown packages to use pypi.mk and pypi in general instead of
github.

This allows us to remove version replacement as that is already done in
pypi archive.

Updated dependencies to also contain proxy dependencies that are listed
in upstream.

Signed-off-by: Karel Kočí <karel.koci@nic.cz>

Signed-off-by: Karel Kočí <karel.koci@nic.cz>