A bit hacky, but it works

Added an event for placing and removing blocks
Added a class to wrap event calls in a try-catch
Removed BlockDoesNotExistException
Made Block.GetSimBody() return null if block doesn't exist

Added center of mass
Removed delta velocities

Made GetBlockInfo() always return a reference without needing it as a parameter
Fixed Color property
Added CustomColor property for temporarily setting any color

Added API for adding more information on the debug display (not object-oriented yet)
Removed the setter for block type to ensure stability
Made the block API return defaults if the block no longer exists
Added property to check if the block exists
Made a struct for the block's color property
Added missing block IDs

Placement, movement, rotation, removal
Block looked at (in Player class), connected blocks