Slight link error on home page

[jypeter]

When I hover over take a look at the Discussion page on the home page, the displayed link is http://cf-convention.github.io/discussion.html when it should probably rather be http://cfconventions.org/discussion.html

[JonathanGregory]

Yes, I agree with you. We should change that. Thanks.

[JonathanGregory]

Please could someone check and merge #151 to correct an erroneous link on the CF home page. Any member of the committee or governance panel should be able to do this. Thanks.