Fix sugar cane/cactus growth
Entities no longer go sporadic when spawning.

Velocity needs a better fix but now things are smoother.
Signed-off-by: Chris Sanders <zidane@outlook.com>
Use variables
Basic custom lighting system
Match leave despawning algorithm minecraft uses - don't despawn player placed leaves
Fix grass spreading
Aynsc message handling
Cache values
Add TPS command
Added Entity following!

Simply spawn an entity and have a good time. AI begins!
Signed-off-by: Chris Sanders <zidane@outlook.com>