Resolved  - Removing old buildings on enemy capital (when not last city) no longer crashes

Resolved  - Concurrent modification fix for liberated city with multiple units in it

Resolved  - Removed static wrapper functions from WorkerAutomation

By SomeTroglodyte:
- Notifications architectural update 
- Fix ruleset error crash 
- Mod name defense attempt II 
- Make UncivGame.isInitialized inaccessible outside of the class hierarchy 

Zoom in/out of the history charts  - By JackRainy

By SeventhM:
- Adding field for great person type 
- Tech column validation and removing crashes from undefined building costs 

More unit unique tests  - By xlenstra