replace hardcoded ImageMagick with generic 'variant processor'
replace hardcoded ImageMagick with generic 'variant processor'

georgeclaghorn/rails,MSP-Greg/rails,rails/rails,MSP-Greg/rails,georgeclaghorn/rails,rails/rails,yahonda/rails,esparta/rails,esparta/rails,yahonda/rails,rails/rails,esparta/rails,MSP-Greg/rails,yahonda/rails,MSP-Greg/rails,georgeclaghorn/rails,yahonda/rails,rails/rails,esparta/rails,georgeclaghorn/rails