* Fixed G&K policy eras
Patronage should be Medieval and Freedom should be Industrial in G&K
* Added 'priorities' object to policy branch entries
* Fixed Vanilla policy eras
Also set testing priorities in advance
* Partial code formatting
* Reworked how the AI chooses a policy to newly adopt
* Removed debugging codes
* Update Civilization-related-JSON-files.md
Added Branch priorities
* Assigned actual priorities to each branch
Also fixed a debugging value in Ruleset.kt (-1 -> 0)