Revert "Sticky footer"

This reverts commit 3242e72cfcebe963d7fa132999e7745a93d82295.
First pass on major Casper overhaul and new Multi-user support

- Introduces author.hbs page template
- Completely refactors header styling with new full-screen cover images
- Adds new, improved pagination with additional styles for archive pages
- Cleans up a fuckload of bloat and old styles