LayoutGenerator improvements
LayoutGenerator improvements

allow get_layout to be called multiple times
improve style and documentation

nyrocron/eve-wspace,evewspace/eve-wspace,Unsettled/eve-wspace,nyrocron/eve-wspace,evewspace/eve-wspace,marbindrakon/eve-wspace,Maarten28/eve-wspace,mmalyska/eve-wspace,evewspace/eve-wspace,Maarten28/eve-wspace,mmalyska/eve-wspace,Maarten28/eve-wspace,mmalyska/eve-wspace,marbindrakon/eve-wspace,evewspace/eve-wspace,mmalyska/eve-wspace,marbindrakon/eve-wspace,marbindrakon/eve-wspace,Unsettled/eve-wspace,proycon/eve-wspace,nyrocron/eve-wspace,proycon/eve-wspace,Unsettled/eve-wspace,Maarten28/eve-wspace,proycon/eve-wspace,Unsettled/eve-wspace,proycon/eve-wspace,nyrocron/eve-wspace