Issue 146: Add support for document previewing - The official repository and issue tracking for srchub.

Reported by Natalie Adams, Mar, 21 2016 9:24:40 PM

Google and Microsoft both provide a web based solution to preview 
word documents and PDFs.

Adding a dropdown to choose which one a user wants to use for their 
project would work.

http://stackoverflow.com/questions/27957766/how-to-render-word-docume
ntdoc-docx-in-browser-using-javascript

<iframe src="
http://docs.google.com/gview?url=http://remote.url.tld/path/to/docume
nt.doc&embedded=true"></iframe>

<iframe src='
https://view.officeapps.live.com/op/embed.aspx?src=http://remote.url.
tld/path/to/document.doc' width='1366px' height='623px' 
frameborder='0'>This is an embedded <a target='_blank' href='
http://office.com'>Microsoft Office</a> document, powered 
by <a target='_blank' href='http://office.com/webapps'>Office 
Online</a>.</iframe>