fix sbm doesn't have multiplier.'
Merge branch 'master' of github.com:Coursemology/coursemology.org

* 'master' of github.com:Coursemology/coursemology.org:
  multiple files upload for missions and training
  welcome page refactoring
  auto login app if Facebook is connected
  adding multiple file uploads control
  fixed resource loading error when customised theme incorrect
  correctes spelling mistake "staff" -> "stuff"
  allow stuff to edit students details
  enable edit of name for stuff management
  change date to date time for creating mission, training and announcement