- added calc cmd
- added calc cmd

SVN=125025

tianon/debian-golang,gnanderson/go,bdwalton/debian-golang,bdwalton/debian-golang,bdwalton/debian-golang,pombredanne/go-deleteme,apparentlymart/golang,firebitsbr/golang-old,nightlyone/golang,apparentlymart/golang,ssrl/go,wesolows/golang-old,pombredanne/go-deleteme,tianon/debian-golang,wesolows/golang,firebitsbr/golang-old,tianon/debian-golang,ssrl/go,pombredanne/go-deleteme,wesolows/golang,nightlyone/golang,tianon/debian-golang,dsriram/golang,nightlyone/golang,apparentlymart/golang,h8liu/golang,tianon/debian-golang,ssrl/go,ssrl/go,tv42/old-go,nightlyone/golang,nightlyone/golang,h8liu/golang,wesolows/golang,wesolows/golang,h8liu/golang,ssrl/go,h8liu/golang,wesolows/golang-old,gnanderson/go,wesolows/golang,wesolows/golang-old,tv42/old-go,tv42/old-go,ssrl/go,firebitsbr/golang-old,wesolows/golang-old,dsriram/golang,bdwalton/debian-golang,nightlyone/golang,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,firebitsbr/golang-old,nightlyone/golang,apparentlymart/golang,wesolows/golang,tv42/old-go,firebitsbr/golang-old,h8liu/golang,bdwalton/debian-golang,apparentlymart/golang,gnanderson/go,h8liu/golang,firebitsbr/golang-old,h8liu/golang,apparentlymart/golang,tianon/debian-golang,gnanderson/go,tv42/old-go,ssrl/go,dsriram/golang,tianon/debian-golang,dsriram/golang,pombredanne/go-deleteme,wesolows/golang-old,dsriram/golang,wesolows/golang-old,wesolows/golang-old,gnanderson/go,wesolows/golang,tianon/debian-golang,dsriram/golang,pombredanne/go-deleteme,firebitsbr/golang-old,pombredanne/go-deleteme,bdwalton/debian-golang,tv42/old-go,bdwalton/debian-golang,apparentlymart/golang,gnanderson/go,bdwalton/debian-golang,tv42/old-go,firebitsbr/golang-old