add MAINTENANCE section

Describing the goal of maintenance for this module as aligned with
David Golden (author of the lines) and Matt Trout.
create bundle
bundle non-core using ExtUtils::BundleMaker 0.005

* improve deal with "remaining" prerequisites after bundling
travis needs bundlemaker ...
try figuring out why EU::BM's dependencies missing

Travis log shows that no EU::BM dependencies are installed. Find out
if a cpanm switch can disable ...
bump required EU::BM version to 0.006

ExtUtils::BundleMaker 0.006 is the first version using ExtUtils::MakeMaker
which seems to be much more stable with meta-spec v2.
note Changes 0.400_009
bump version to 0.400_010 for remaining issues