sh2py : convert shell script -> python (basic pass)

http://git.sugarlabs.org/rainbow

(CustomsSentry)│git clone https://src.sugarlabs.org/rainbow/mainline

http://git.sugarlabs.org/rainbow/mainline/commits/ms/sh2py


TODO:
*  echo -> print
* remove; `do`, `then`
* ... `done`, `fi`, `esac`