Encrytion Readme Example need a update

[AndreasHohnholt]

Hi,

I implement my encryption/decrytion (based on the sjcl lib) like the readme example but it does not work, because of the _revisions field.

This works for me:

localDB.transform({
        incoming: function (doc) {
          Object.keys(doc).forEach(function (field) {
            if (field !== '_id' && field !== '_rev' && field !== '_revisions') {
                //appuser is the current user logged in to the app
                var fieldValue = sjcl.encrypt(appuser.GetDBPassword(),angular.toJson(doc[field]));
                doc[field] = fieldValue;
            }
          });
          return doc;
        },
        outgoing: function (doc) {
          Object.keys(doc).forEach(function (field) {
            if (field !== '_id' && field !== '_rev' && field !== '_revisions') {
              var fieldValue = angular.fromJson(sjcl.decrypt(appuser.GetDBPassword(),doc[field]));
              doc[field] = fieldValue;
            }
          });
          return doc;
        }
    });

[gr2m]

Thanks Andreas for letting us know! Could you send a pull request updating the README with your fix please?