Fixes for new facebook site

[weskerfoot]

• [x] Make post deletion work with the Facebook re-design by switching to mobile.facebook.com
• [x] Check that conversation deletion / archiving still works
• [ ] Check that page unliking still works
• [x] Fix issues with timestamp
• [x] Fix issues with archiving not using the same file during a run
• [ ] Force redirect to the mobile site, no matter what URL the user passes in