doc tweaks
sort the dumped %configure_requires prereqs, for consistency across releases
weeding out of version ranges was never being done - fixed!
add commented-out dump_config as placeholder
adjust prereq so it is visible via "dzil authordeps"
tighten up entries
drop the ego lines in changelog entries
Dist-Zilla-Plugin-MakeMaker-Fallback-0.006

          - now sorting the dumped %configure_requires prereqs, for
            minimizing diffs between releases