Resource bonuses and system-wide facilities

[Shyrka]

System-wide abilities and local abilities stack. However, i've read some Posts that say that some facilities don't work correctly, for example the religious shrines. I'll do some experiments to see what happens to production when different types of resource-gathering facilities are combined.

These experiments will need paper&pencil, due to the lack of an "system report" screen or so. I think it is needed.