1. Allows CUI handshake package to overwrite protocol version.
2. Sends the current selection on handshake.
3. Removed redundant SelectionShapeEvents.
Conflicts:
src/main/java/com/sk89q/worldedit/regions/selector/ConvexPolyhedralRegionSelector.java
src/main/java/com/sk89q/worldedit/regions/selector/CylinderRegionSelector.java
This breaks backwards compatibility for all getWorld() methods, but
shim methods were added for binary compatibility with method calls that
use LocalWorld.