Commits
Merge with Vailin's memory management fixes. Merge branch 'feature/vfd_swmr' of https://bitbucket.hdfgroup.org/scm/~vchoi/my_hdf5_fork into feature/vfd_swmr
Merge with Vailin's memory management fixes. Merge branch 'feature/vfd_swmr' of https://bitbucket.hdfgroup.org/scm/~vchoi/my_hdf5_fork into feature/vfd_swmr