Don't exec and stop the task chain

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Support list by creator

This fixes #102.

You can filter with the `--creator` flag:

  $ ghi list --creator        # issues you created
  $ ghi list --creator foobar # issues @foobar created

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Bump version

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Merge branch 'master' of github.com:stephencelis/ghi