WorldBorder and Potions

Added new method to set the startingDiameter, endDiameter and the time it will take [void setDiameter(double startDiameter, double endDiameter, long time);]
Added Splash potion option.
Changed Radius to Diameter.
Changed get/setBlockBuffer to get/setBuffer and changed the return and parameter to double as it is not measured in whole blocks.
yes, Minecraft handles the world border as a diameter not as a radius. This makes it less confusing for people as also the commands in minecraft to use the worldborer also use the diameter and not the radius.