New version for Firebird Perl driver

Changes for version 1.12

  • Implement event objects as blessed scalar refs
  • Include event creation/destruction in 60-leaks.t
  • Fix for the reference test for softcommit
  • Update README¬†Fix comment about setting firebird home
  • Add markdown version of the README file
  • Update Makefile.PL removing old platforms
  • Test invalid lock resolution with ‘throws_ok’