stop using __DATA__ so we can use fatpack or w/e
fix eval error checking
do should be marginally more efficient than a sub {}
nested key example

This works to significantly slow down discovery of inner code.  This example is
fairly sensible as it shows how to use a relatively unobvious starting key and
then on the inside there can be a number of other environmental keys.  While
this one merely uses the perl version on the inside, one could obviously use
other variables, including a literal keyfile.
Create an actual nester interface

Woo Steely Dan!
this should have gone away at f723740b51101bb2f1e94a428356f1ba426b0794
remove shebang from generators