Upgraded Dropzone to v3.10.2. Fixed issue with "Dropzone" global not being available in Meteor.
updated for spark/blaze compatibility
Merge pull request #5 from aramk/meteor-dropzone

* v3.10.2:
  updated for spark/blaze compatibility
  Upgraded Dropzone to v3.10.2. Fixed issue with "Dropzone" global not being available in Meteor.