include finder names in config used by [MetaConfig]
go back to testing .pm files with -Ilib
v2.012

 - .pm files are once again tested with -Ilib, instead of -Mblib, to avoid
   potentially loading files twice (this was changed in 2.009).
some more release-time checking
test with blib again - this should be okay
strip leading lib/ to properly solve the duplicate loading issue
v2.013

 - .pm files are tested with -Mblib again; 2.012 was a mistake.
 - now require()ing files without the leading lib/, to avoid potentially
   loading files twice (a problem since 2.009) - thanks dolmen and haarg!