Initial proof of concept
Removing Allow-access-from-origin header as this header is helpful if deployed on the server that hosts the pdf not the one viewing it.

The only way to get around this is to host a proxy at app engine but that means using up bandwidth.

I think the way to go here is to host the pdfs on app engine site.
Rendering sample PDF
Added initial support to render multiple pages.
Merge remote-tracking branch 'github/master'

Conflicts:
	src/models.py
Merge branch 'master' of https://github.com/Jeeqs/Jeeqs
Refined page rendering.
Merge branch 'master' of https://github.com/Jeeqs/Jeeqs