Added a "endless pages" option to the user profile.

This is an alternative to the Google style pagination links that aren't
that great on mobile browsers. Or my thumbs are to big, not sure.
Added ability to mark only a page as read.
Removed unneeded attribute.
Merge branch 'per-page-read' into endless-pages
Make sure the initial passed page number is an interger.
Remove the per-entry include of the entry include to improve performance.
Added a text to read buttons to ease distinction.
Recompressed the bundle js.
Removed the text next to the read button again and added a JavaScript based prompt.
Updated bundle.
Merge remote-tracking branch 'jezdez/endless-pages'

Conflicts:
	feedhq/core/static/core/css/screen.css
	feedhq/core/static/core/js/bundle.min.js
	feedhq/feeds/templates/feeds/entries_list.html
	feedhq/profiles/forms.py
Make 'mark page as read' only mark as read what the user sees

Fixes #41
Made endless_page on by default
Only flush the test DB during tests, not everything
Fixed a flake8 warning
Added a keyboard shortcut for loading more pages