milestoneDueOn and repoLanguage are now Maybe types.
Introduce GithubOwner as the sum type for a GithubUser or GithubOrganization. Everything that once produced a GithubUser now produces a GithubOwner. All record accessors have changed their names
Similar to GithubOwner, introduce DetailedOwner, which can be a DetailedUser or a DetailedOrganization. All record accessors have changed their names
An HTTPConnectionError now composes SomeException instead of IOException. All exceptions raised by the underlying http-conduit library are encapulated there.
The githubIssueClosedBy function now produces a Maybe GithubOwner.