Resize competition image

also made some html files prettier to look at
Update competition image size
update _team_detail.html
Use modal for registration
Merge pull request #15 from jonsimington/style

Update styles
Hide 'Unregister' in sidebar when competition isn't open
Change Register back to button from modal
Merge pull request #16 from jonsimington/style

Change Register back to button from modal
Add mark paid / eligible buttons to team page
Add unit tests for team_update
Merge pull request #17 from jonsimington/style

Add mark paid / eligible buttons to team page
Move QR code to Team Status section
Merge pull request #18 from jonsimington/style

Move QR code to Team Status section
Update competition list

also changes the size of avatars’ thumbnails
Remove extra table stuff
Merge branch 'jonsimington/style' into develop