Rewrite much of section 2, the theory
Rewrite much of section 2, the theory

ndmitchell/shake,nh2/shake,nh2/shake,ndmitchell/shake,nh2/shake,ndmitchell/shake,nh2/shake,ndmitchell/shake,ndmitchell/shake,ndmitchell/shake,nh2/shake