Updated for Silence and Fury.

Updated to get rid of "out of date" mod tag.
Also fixed a typo that made golden order units lock.

Vassals should now make peace with old enemies and make war with those who their owner are at war with.
removed the authority bonus for vassaling.
removed gold cost for the three technologies.
added lvl 2 barracks requirement for spear tech
added lvl 1 stables requirement for horse tech

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