use Module::Metadata to parse version, rather than loading file
new test for the case where prereqs are found in the repo
queue up modules we would query for, to fix logic of when to use 02packages
combine the two "many modules" tests into one file
include more debugging information on relative paths

win32 thinks all modules are provided locally? -- e.g.
http://cpantesters.org/cpan/report/b801cd1f-6bf5-1014-9187-f3c78887c6f4
http://cpantesters.org/cpan/report/cdd7d737-6bf8-1014-824e-61699f102592
http://cpantesters.org/cpan/report/68cedc84-6bf4-1014-a364-5bc58887c6f4
Dist-Zilla-Plugin-PromptIfStale-0.012-TRIAL

          - no longer loading each module being checked in order to get its
            $VERSION
          - fix logic for choosing when to pull down a copy of
            02packages.details.txt (now only doing so when otherwise we would
            make six or more HTTP hits to PAUSE)
          - more diagnostics printed in failing tests