added ISO date transformer to JSON deserialiser
ROO-3438: Generate JSON methods to de/serialize dates in the ISO 8601 format
ROO-3438: resolve merge of 1.2.5 dev branch conflict
ROO-3438: resolve merge of 1.2.5 dev branch conflict
Merge pull request #51 from tstephen/master

ROO-3438: Generate JSON methods to de/serialize dates in the ISO 8601 format