Many changes.
* Fix bad bug in extinct flag propagation
* New match criterion - same primary source id - cuts down on number
  of deprecations due to ambiguity
* Bump version to 2.8draft1
* Synonyms Glaucocystophyceae, Haptophyceae, Rhodophyta,
  Thraustochytriaceae, Berendtia rugosa
* Add some more silva/if exclusions
* Flush Byssus phosphorea, too difficult
* Continue futzing with Chromista and Protozoa (inconsequential I think)
* Set more NCBI taxa extant: Zemetallina etc.
* Clean up NCBI Cycadidae a bit
* Deal with name changes in new version of NCBI
* Harden uniqueName a bit so that non-union taxonomies can be dumped