Style loader causes wrong regex match

[aleckravets]

If the loaded resource is bundled with webpack+style-loader and minified (no spaces), source map loader triggers the false regex match due the the following line in the style loader's runtime code (addStyles.js:235):

css += "\n/*# sourceMappingURL=data:application/json;base64," + btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))) + " */";

and fails trying to parse this string.

[michael-ciniawsky]

@aleckravets Should be fixed by #31