Add support for additional formats in Prettify viewer - (X)HTML source, XML, Bash
Support line numbers in PrettyPrint viewer via lineNums attribute
Merge branch 'master' of https://github.com/share-extras/media-viewers
Fix for issue 4 based on ALF-18570 fix in Alfresco
Protect against spin.js not being loaded - workaround for issue 5
Updated to PDFJS.version = '0.8.237' - PDFJS.build = '152e376'
Merge branch 'master' of https://github.com/share-extras/media-viewers into pdfjs