Various fixes

- pages not loading dues to capitalisation of 'Panels' folder - fixed
- some css quirks due to modifications of af.ui.css - switched to
af.ui.min.css from fresh install of XDK (i.e., reverted back to default
css)
- commented out a bunch of js that didn't appear to be doing anything
useful
- made headers inline, moved them from index.html into panel html files
- re-enabled back button by commenting out css