Alpha v2.1.0426

Updates/Changes:
- More optimization to city spawning
- Keybind for locking camera down to city center (Default: L)
- Reputation will affect trade opportunities with other cities

Bugs Fixed:
- Can't unlock unlimited population after you reach the default maximum
- Pirate city could launch interaction instead of instant invasion
- Calendar error when loading older saves
- Errors when deleting buildings with resource piles on them
- Infinite boxes spawning, lagging game if deleting a building
- Navmesh to other cities breaks sometimes
- Other Cities moving too fast when retreating for things
+ Removed Martin