The separate download page. For issue #157
Move freeformat files list to download page. For issue #157
Merge branch 'master' into download_page
improve freeformats file display.
Merge branch 'master' into download_page

Conflicts:
	app/views/datasets/_edit_download_destroy_links.html.haml
	app/views/datasets/show.html.haml
	public/stylesheets/style.css
Some tweaks.