i am so glad to be reminded of this. Now i just need to implement a filter for assetic at some point. Assetic still relies on opti{png,jpeg} which i'm sure wor

i am so glad to be reminded of this. Now i just need to implement a filter for assetic at some point. Assetic still relies on opti{png,jpeg} which i'm sure works pretty well, but also requires one to call out to an external program.