Screenshot of element and checking diffence between images #17
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Part of the dalek PR dalekjs/dalek#112
To dalek-driver-native was added Image lib that support necessary for changes in dalek operations. Image lib relies on node-pngjs lib, that is simple pure js lib for work with png files.
I was inspired by @StoyanStefanov post http://www.phpied.com/css-diffs-2/
I'm quite new in github and open source contribution, so please let me know if I'm doing something in wrong way.