D1472 groups all civbonus technologies under technologies/civbonuses/
D1775 deletes unused technologies that were deprecated years ago
Special technologies are technologies that have a `"civ":` or `"notciv":` requirement, i.e. they're available to one or more factions, but not all. Currently some are grouped alongside regular technologies, others are arbitrarily distibuted over the carthaginians/, hellenes/, kushites/, mauryas/, persians/, romans/, and successors/ subdirectories.
This patch:
* merges identical technologies (archery tradition, naval architects)
* moves special technologies out of those subdirectories, occassionally implementing more consistent naming
* updates specific structure template production queues accordingly