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Merge branch 'master' of github.com:jummonk/leuven2013.drupalcamp.be

# By Jonas Doms (5) and G-raph (3)
# Via G-raph
* 'master' of github.com:jummonk/leuven2013.drupalcamp.be:
  BBQ page.
  Bier page and sidebar cta's.
  Bierfoto.
  Jonas: #3: hide 'propose a session' tab for anonymous users
  Jonas: #3: 'propose a session' tab added
  Jonas: #27: prevent 'undefined index'
  Jonas: #27: 'message' improved
  Jonas: #27: small explanation added + #45: my_program only accessible when logged in