Unable to load epub where paths to resources are not normalized

[kamilgolunski]

Loading epub fails when path to resources (like images or fonts) are not normalized, e.g "img/../img/cover.jpg" or "css/../fonts/font.ttf".

I get error on line:
https://github.com/logiclord/epubReader/blob/master/js/epubReaderFileFacilitator.js#L69,
data is called on 'null', I think that "imgpath" should be normalized.

[logiclord]

Good catch. Yes, this seems like an issue. Here I have assumed that JSZip Library will take care of such path.