stackmob/stackmob-js-sdk — pull request #53 by ericktai (2013-03-29 17:01:20+00:00)
Title: Card 608 Client side fix for binary data null saves

Example:

```js
StackMob.Model.extend({ binaryFields: ['pic', 'largepic'] });
```
On-save, the `pic` and `largepic` fields will not be sent up to the server if they start with "http", implying that it's already a binary field that's been saved to S3