started migration to bootstrap 3; including base+login/signup
git-ignoring .DS_Store files
removed crappy captcha implementation
removed separate signup page
updated demoevent to 30c3
updated hero to show event logo
some copy changes on default.html
fixed a small regex mistake for admin API
updated demoevent footer for 30c3
introduced new Merchandise model
EOL fix
cleaned up buy view, changed merchandize handling
fixed django messages display for bootstrap 3
optimized golden token copy and display
merchandise detail link now on same level as name
Revert "merchandise detail link now on same level as name"

This reverts commit d126623d61469509d5a298e9e7e1f6eed249fc84.
login and signup boxes on default page have now the same height and both buttons are on the same height too
fixes border radius of email field on default page
made merchandise display text more customizable
merch detail text is now considered safe