Hotfix C

- Fixed extra election event spam:
  * Use vanilla's extra election events for major political issues
- Fixed Caucasian Wars
  * Split Caucasian war into two separate wars
  * Fix Circassia and Dagestan OOBs
  * Remove Circassian units from Russian OOB
- Fixed war files
  * Add end to Taiping rebellion
  * Fix casus belli for Massina Jihad and Cochinchina campaign
- Reorganized terrain file
- Reworked populations
  * Revert craftsmen POPs to vanilla levels
  * Revert Russian clergy POPs to vanilla levels
  * Clean up most files for better comparison with vanilla files
- Increased supply limit modifier for core province
  * Supply limit for core provinces is now +3. This is a workaround for the new low supply limits (half of vanilla's)