FIX: Change ImageFunctions to use DataExtension
ADD: Update README with new requirements and usage
Merge branch 'release/2.0'
ADD: Include composer file
Merge branch 'release/2.1'
ADD: Create PlaceholderImage feature
Merge branch 'release/2.2'
ADD: Update composer.json read for public release
Merge branch 'release/2.2.1'