Update pods.
Add image picker to demo editor.

This will allows to test image related progress behaviour.
Set opacity of image while progress is running.
Add progress bar to image.
Implement callback on image tap.
Merge branch 'develop' into feature/media_progress

Conflicts:
	Example/Pods/Pods.xcodeproj/project.pbxproj
Don't add progress on update if not present.
Only show progress if image available.
Add method to mark image as failed.
Merge branch 'develop' into feature/media_progress
Make image opacity low on fail or cancel instead of blur because of performance issues.
Improve documentation on method.
Refactor progress id creation.
Refactor method name to make it more clear.
Remove progress bar.
Progress bar according to WP style.
Remove non existent return type from doc.
Style fix.
Remove img border on selection code.
Make id consistent using _