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[WIP] catch remote resource in CSS
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[WIP] fetch remote image and base64 it

Actually for a remote image, the request callback failed to write on
file.
Base64 returned when gulp process is finished.

[WIP]

WIP
Fetch remote resource, add test
Add test for remote resource
JsHint, JsBeautifer, use strict
Update README.md
Merge pull request #5 from zckrs/fetch-remote-resource

Fetch remote resource