An image manipulation library.
As of v4.0.0 darkroom requires 1.3.20+ to work correctly.
It will still mostly work with GraphicsMagick 1.3.18+ but the resize({ mode: 'fit '}) will
not work due to this #36
v4 will not work well with GraphicsMagick pre 1.3.18
v4.7.0 requires 1.3.26+ to fixed issues with GM not identifying some gifs.
brew install graphicsmagick
npm install --save