Fix detaching on unthreaded perls
Fix readonly flag on attaching
Switch to Test::Warnings
Switch tests to Test::Fatal
Add description
Update dist.ini
New id option is a shm_id, not a proj_id

This enables opening on shared memory identifier
Allow detection of size of shared memory segment
Various doc tweaks
Refactor get_shm into being
Add shared_detach and shared_identifier
v0.009

          *Backwards incompatible change*: new id option is a shm_id, not a proj_id. This also affects the order of precedence.
          Allow detection of size of shared memory segment
          Add shared_detach and shared_identifier
          Fix detaching on unthreaded perls
          Fix readonly flag on attaching