Add the ability to remove `logger.info` "Rasterizing image for faster rendering."

[LucaMarconato]

Reported by @MeyerBender and @LazDaria

remove [logger.info](http://logger.info/)("Rasterizing image for faster rendering.") in utils (or at least give a verbose argument that is False by default)

[MeyerBender]

I already implemented this in #524, just needs to be merged :)

[timtreis]

Closed in #524