Changes for version 0.12
- Fix : Check functions are now replaced and restored in a thread-safe manner, either by using the wrap_op_checker() function from perl when it is available (starting from perl 5.16) or by taking the OP_REFCNT mutex on older perls.
- Tst : Author tests are no longer bundled with this distribution. They are only made available to authors in the git repository.
- autovivification - Lexically disable autovivification.