store the minting profiles in a dist sharedir rather than module sharedir
no need to ship the pre-templated profile.ini
ensure that modules in profiles are still not indexed
index .pod files as well as .pm
use default installers, rather than just MakeMaker
Merge branch 'topic/mbt'
bump [PodWeaver] prereq, to avoid issue in 4.003

dists with a weaver.ini but no config_plugin setting were blowing up:
e.g. http://www.cpantesters.org/cpan/report/b1a4de3c-79fd-11e3-8f3c-fc23d5af1b80
Dist-Zilla-PluginBundle-Author-ETHER-0.046

          - ensure that .pod files are also eligible for indexing
          - minting profile switched to using a dist sharedir to store
            profiles, so we can now ship using Module::Build::Tiny