Silo fix, faction fields "tavernVideo","guildBackground" added

Added "tavernVideo", "guildBackground" to "faction" JSON config and schema. 
Silo fix. If "primaryResource" is set to "gold", silo will generate 500 gold per day.
PS there appeared file  lib/JsonDetail.cpp, I didn't change it, it appeared automatically. It's my first commit so if this file can be not taken, not take it.