Prototyping uploader.
Implemented file uploader styles.
Added drop zone functionality with file api reader.
Implemented selector bindings to add files
Some uploader control bindings.
First XHR tryouts
File upload progress update via listener
Some advancements in file progress styling.
Updated item progress bar to display properly.
Updated progress meter.
Implemented uploader button styling with a hidden input element
Wrapped file reader in a callback to properly add files
Minor bugfixes
Merge branch 'refs/heads/Feature/Uploader' into Feature/UploaderBugfix

Conflicts:
	public/shift-media/javascript/uploader.js
	public/shift-media/js/uploader.min.js
Merge branch 'refs/heads/Feature/UploaderBugfix' into Feature/Uploader
Implemented upload acceptance and item creation on backend.
Some updates to uploaded functionality.
Minor upload adjustments
Uploader icons
Latest updates.