Rewrite script/boostrap in Python
Rewrite script/boostrap in Python

This is the first step toward supporting Windows.

tejaspathak/brightray,paulcbetts/brightray,hokein/brightray,atom/brightray,bbondy/brightray,deepak1556/brightray,tejaspathak/brightray,brave/brightray,paulcbetts/brightray,lakshmi-srinivas/brightray,lakshmi-srinivas/brightray,brave/brightray,bbondy/brightray,lakshmi-srinivas/brightray,atom/brightray,hokein/brightray,deepak1556/brightray