Move example configs to a separate dir, add envs

sampleconfigs/config.sample.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python2
+
 # Copy this file to config.py, then amend the settings below according to
 # your system configuration.
 

sampleconfigs/makebs.config.sample.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python2
+
 # You will need to alter these before running makebuildserver.py
 
 # Name of the base box to use...