Number of watchers is actually number of stars.

Since the github api changed in 2012 the number of 'watchers' in the
repos end point is actually the number of 'stars'. This commit
fixes the description, and also points the link to the correct
github page.
Changed links to value rather than key.

All other links are on the value; this puts all the links on the
right-hand side.
Merge pull request #975 from mbeijen/github-info

Watchers/forks count on github info page incorrect