added spf13 option to enable/disable wrap relative movement mappings
fixed wrap relative motion mappings to address problem reported in spf13/spf13-vim#464 , d$ now deletes last character of line
rolled back some changes to ensure d0 and d^ match default behaviours, spf13/spf13-vim#464
Merge pull request #550 from lukedomanski/3.0

Fixing d$ not deleting last character of the line after wrap relative motion code was replaced