[Distutils] How to handle launcher script importability?

[Matt Wilkie]

> I know I'm bike-shedding here, but my preference for extension would be
> '.pye' as it indicates something to execute, but without indicating
> exactly  how (i.e. that it's via a separate launcher executable).

.pyx

that said, both .pye and .pyx are superior to .pyl  (is that last
character an "ell", an "eye" or a "one"?)

-matt