Updated files in /common

Added some missing "interesting characters" from vanilla bookmarks,
imported remaining mod bookmarks.
Imported modified combat_tactics and retinue subunits from old mod:
changes were part of Better Armies, not clear on rationale, may need to
reconsider after testing)
Updated Indian, Jewish, and Nubian retinues from vanilla to match
300-per-subunit size of other mod retinues.
Rolled back technology to vanilla: changes in mod file were no longer
relevant/justified.