fix requires calculation in Makefile.PL
include inc dir
Revert "allow older EUMM when testing"

This reverts commit 24a2ef6e926e11183765e5237318f40e0158bffe.
make Test::CPAN::Changes a develop recommendation
use travis helpers
revise version checking
prevent config check from triggering interactive config
avoid note and explain in tests to aid backcompat
new Test::More needed for dev
update EUMM on travis to get develop prereqs
don't overwrite Makefile when running bootstrap test