0.86 -> 0.861

Additions
- Two new rounded block types added.
- First density of 3x3 commercial buildings added.

General adjustments
- Adjusted industry input and output values. Overall they now produce more goods. Labour needs are scaled a bit more appropriately.
- Adjusted hotel input and output values. Also raised tax revenue from hotels, because the input requirements are now higher.
- Raised residential tax income slightly.
- Adjusted lighting bias to decrease flickery shadows from small objects.
- Hotels are now boosted by convention centers, stadiums and museums.
- Industry now boosted by goods ports.
- Commercial buildings now properly boosted by nearby convention centers.
- Commercial building service output changed.
- Commercial zones now placed using zone planner, same as residences and industry.
- Culture output increased from sanctuaries.
- Parks now output a small amount of culture to help cover the needs by residences. Hotels require more culture, so they will require larger output (from convention centers, stadiums and ideological buildings for example).
- VAT policy now calculated from population + tourists + services produced.

Difficulty refinements (easy to hard)
- Increased tax income on easy mode.
- Made conglomerates less cranky (except on difficult mode). They will also anger less when demolishing their buildings.

Bugfixes
- Fixed rounded blocks not lighting up when bulldozing.
- Fixed bug where special blocks could be demolished despite building being placed on them.
- Sanctuaries were missing from culture display.

Other
- Decoration code cleaned up.
- Destruct code cleaned up.
- Made additions to stop threads earlier in large cities to improve shut down speeds.
- Further improvement to connection issue in large cities.
- Added zone count display when placing zones (based on the size selected).