Version 4.0 is listed in release-info, but not tagged

[sjamaan]

This causes an error when fetching it:

Error downloading or extracting egg 'monad' release 4.0 (CHICKEN release 4): 
Error: Could not fetch targz-file https://github.com/dleslie/monad-egg/tarball/4.0 -- Client error: 404 Not Found

[dleslie]

Whoops