Add Null check to SendBlockTo

Fixes CID 43611
Check GridSize for 0

Fixes CID 68226 and CID 66437
Fix sheep color's, add shear sound.
Save IsSheared from Sheep.
Code fixes.
Moved the random code to a function (cSheep::GenerateNaturalRandomColor())
Add doxy-comments.
Implemented trapped chests & others

+ Added trapped chests
* Fixed a bunch of bugs in the redstone simulator concerning wires and
repeaters
* Other potential bugfixes
Fixed compilation and pressure plates
Made things consistent
Fixed Bucket placing
Fixed Bucket Placing
Maybe fixed whitespaces
Maybe fixed whitespaces
Changes
Improved LinkedPowering speed

* Additionally fixed wires powering other wires through blocks
Suggestions
Changes
Suggestions
Changes