Merge pull request #43 from reverbdev/ie-cors-support

IE CORS Support [Fix #42]
Added support for ordering images
Add fileremoved event so that we can bind to it from outside

We are using this in external javascript to display different messages depending on whether there are files present.
Make uploads parallel. Overall progress bar works just fine.
Support for cloudinary options: eager/base transformations
Ensure tags are unique. Otherwise you get 500 errors from Cloudinary