Do not re-encode images that have already been encoded.
Do not re-encode images that have already been encoded.

Core supports encoding images inline, so don't re-attempt their encoding.

nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus,nicholasryan/CorePlus