- added support for custom resizer controllers

[jeremangnr]

This gives anyone the chance to create their own custom resizing controllers easily, you just have to implement the DMResizerViewControllerProtocol in your view controller and make sure to call the resizerDelegate when you've fixed the image to the correct size.

[coryalder]

Hey Jeremias,

Thanks for the pull request, this looks like a great change. I'll test this out over it on the weekend, and assuming everything looks good, merge it!

[jeremangnr]

Thanks! Let me know how it goes