[Review] Request from 'KalabiYau' @ 'openSUSE/osem/review_140430_style_cleanup'

Please review the following changes:
  * a425d1c As exception is used - we need to interpolate this string
  * 90fe1cc Replace update from member to collection
  * 57ad143 Update form to hot new path
  * 45a6864 Groom Gemfile. Fit into one style
  * 4e395a0 Merge pull request #86 from ChrisBr/fix_eventtypes
  * 195ebe6 Merge branch 'master' of https://github.com/openSUSE/osem into fix_eventtypes
  * b095064 Fix eventtypes form