Link was using a bad relative path. I'm assuming the docs were moved or something.
Fix contributing link
When I look at the readme in master I'm able to navigate through to the contribution docs without any problem. Where were you accessing it from?
Can you update the PR to just provide an absolute path that will work regardless of location? I'd rather do that.
Absolute url for contributing in readme
Link was originally relative, but didn't work when you were viewing
from different locations because of the way that GitHub maps repo
links in markdown.
Issue documented here: github/markup#101
Absolute url for issue submission in readme
Issue submission link suffered from the same relative link issue.
Alright, that should do it. Also fixed another relative link the in the same file.