Allow TKD and Tai Chi manuals to spawn in dojos

Also equalized the spawn chance between all manuals.
Reduce repeats on manual spawn

Because sometimes you can find a dozen manuals all in the same dojo, and that feels silly.
Add TKD, Karate, very rare Muay Thai manual spawns to boxing gym
Add melee and unarmed magazines/manuals to dojo
Add weeabooks to dojo
Merge branch 'patch-11' of https://github.com/Izicata/Cataclysm-DDA into Izicata-patch-11
fix missing comma

I've forgotten commas, too.  No big.