Read options from Rails app configuration in Railtie

[bencrouse]

I wanted to disable pngout for the asset pipeline in a particular Rails env, but there wasn't a good way (from the app repo) to do this. It seemed sensible to allow settings at the app or env level so I could do something like:

config.assets.image_optim = { pngout: false }

Also allows for simple case of:

config.assets.image_optim = true

[toy]

Thanks!
I wonder when will support for config like config.assets.image_optim.pngout = false be requested.