Display the latest match number to have been scored.

This applies to both the league and game points pages, using the
value just added to the /scores/league endpoint.
Extract the location of the comp-api root to a variable.

This removes the need for constant URLs in the controller sources,
and makes it much easier for developers to point these all somewhere
else if desired.
Merge branch 'comp' of git://srobo.org/srweb-devel into comp