Upgrade PDF.js - ckan/ckan GitHub Wiki

• replace pdf.js file
• remove the DEFAULT_URL from the viewer.js and all its usages
• remove PDFJS.workerSrc since it is defined in pdf.html
• move all content from document.addEventListener('DOMContentLoaded', function webViewerLoad(evt){...}) to the function loadPdfJsView in the viewer.js
• upgrade the viewer.css
• remove the position: absolute; from the #toolbarViewerLeft and #toolbarViewerRight since it causes issues in webkit
• upgrade the html, don't forget to keep the data-module
• try to work out the remaining issues (Sorry, it's not that easy)

Example commit: 850ffd72d4cc196c120b1b61f57611870f9c85f5