fix perl_api_link test for broken environments of some windows testers
Changes for version 0.306_001 - 2014-12-01
indent source as requested via issue#4 by Dave Rolsky
consolidate check_... function on_*_true/false parameters (Thanks to Peter Rabbitson for being sounding board)
introduce more Perlish tests whether XS build is sane: check_produce_xs_build, check_produce_loadable_xs_build (Thanks to Peter Rabbitson for being sounding board)
extensive refactoring with some API modifcations (warned users via mail and issue#5)