allow non-alphanumerics in github links
add a party releases relation
display party release info on the party and production pages
add form for editing party releases
Add a help message to stop people adding compo entries to the party releases list
Don't have separate 'Create' and 'Create + enter results' buttons on the 'add competition' view. There will never be an occasion where we don't want to continue to the results screen. Ever.
Merge branch 'feature/party-releases'
use cookie-based sessions
Merge branch 'master' into feature/homepage2014