We no longer look only at the _id field, but we traverse through all fields to find the ones that are defined with the 'ShortId' type.
Updated the README accordingly
Added myself to the list of contributors
The feature of allowing ShortId on any field was implemented incorrectly. Thereby calling defaultSave for every iteration on the for fieldName in this.schema.tree. Fixed by pulling defaultSave out of the for loop
minor version bump as requested by @jjwchoy
Merge branch 'master' of github.com:jouke/mongoose-shortid

* 'master' of github.com:jouke/mongoose-shortid:
  The feature of allowing ShortId on any field was implemented incorrectly. Thereby calling defaultSave for every iteration on the for fieldName in this.schema.tree. Fixed by pulling defaultSave out of the for loop
Merge pull request #9 from jouke/master

Allow ShortId on any field (not just _id)