refer to the other installer plugins
add keywords to metadata
add a placeholder .mailmap
this test is now redundant with t/02-test.t - remove
eliminate a prereq by testing distmeta directly
insert %configure_requires into file when template is run, not when template string is fetched

This is critical when the template is fetched via gather_files rather than
setup_installer, which was changed in Dist::Zilla::Plugin::MakeMaker::Awesome 0.23.
Dist-Zilla-Plugin-MakeMaker-Fallback-0.011

          - properly include %configure_requires content in Makefile.PL
            (broken under Dist::Zilla::Plugin::MakeMaker::Awesome 0.23,
            released 2014-07-30).