Enable responsive design with Bourbon/Neat

Using breakpoints and @include media: see
http://brains.rabid.co.nz/2014/08/22/bourbon.html
Hide some navigation fields on mobile
Connections can now require the death of creatures
Add test for Npc.character_type.get_model
Replace Google Signin link with button
Allow beds to be purchased and slept in
Fix failing test for ItemType[bed]
Merge branch 'master' of https://github.com/soundasleep/rrw