Core: /tp command can teleport either to a player or to a set of XYZ coords

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1663 0a769ca7-a7f5-676a-18bf-c427514a06d6
Ice is a solid block.

Helps with FS #381

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1664 0a769ca7-a7f5-676a-18bf-c427514a06d6