[#6] Preface-top margin expanded for inset shadow + h2 border in sidebar removed + image border radius
Merge branch 'master' of github.com:jummonk/leuven2013.drupalcamp.be

# By Jonas Doms
# Via Jonas Doms
* 'master' of github.com:jummonk/leuven2013.drupalcamp.be:
  Jonas: Less file added with theming for /volunteers and /attendees
[#6] Border radius removed