update background image
update invitation and emails to show workshop
organisers
Merge pull request #148 from despo/display-workshop-organisers

update invitation and emails to display workshop organisers
show coach and student count on invitation page
modify admin workshop view
display all sponsors
Make admin views a bit nicer
- display more subscribers + where they subscribed too
- reformat layout
ensure feedback link is displayed for verified coaches
Merge pull request #153 from despo/ui-tweaks

Ui tweaks