Make the votematch urls conditional on the app being loaded
Add a url field to the parties - #566
Link to the party urls.

closes #566
Explanation of how scores are calculated - closes #561
Text decribing how we store and intend to use the votematch submissions.

Closes #562
Move Kenya-specific commands into the kenya application
Make update_coalition_memberships.bash executable
Link to the party / coalition organisation pages from candidate lists

Thanks to Jessica Musila for pointing out that this should have been done.

Fixes #570
Merge branch 'master' into production