Implement Media showCamera() and hideCamera().

[TIMOB-13694]
Add utility for calling property on a V8 object.

[TIMOB-13694]
Implement camera callbacks and hideCamera().

[TIMOB-13694]
Implement file based Blobs.

[TIMOB-13694]
Expose a way to create JS proxies from TiRootObject.

[TIMOB-13694]
Pass image blob after picture is captured.

[TIMOB-13694]
Support image blobs in ImageView.

[TIMOB-13694]
Merge pull request #99 from joshthecoder/TIMOB-13694

Permission needed in tiapp.xml
```
<blackberry>
    <permissions>
        <permission>access_shared</permission>
    </permissions>
</blackberry>
```


Code reviewed and tested. Request **APPROVED**!