add itksnap alias
add itksnap alias

dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim,dawnsong/spf13-vim