Angular Date Validator

Created a custom type of input field that will only allow numbers and will validate the input-field to a string in the format of "YYYY-MM-DD".

#####Usage:

  <input type="text" ng-model="date" jf-date-validator>

#####TODO (lazy mans issue system):

• Each new input seems to be outside the $digest-cycle
• set up trigger event for "input".
• bring back possibility to edit selection.
• possibility to select the year and type in a new one. now there is a '-' added.