Added Y coord checks and documentation to cBlockDoorHandler.
Added Y coord checks and documentation to cBlockDoorHandler.

johnsoch/cuberite,kevinr/cuberite,Tri125/MCServer,nevercast/cuberite,birkett/cuberite,SamOatesPlugins/cuberite,nichwall/cuberite,electromatter/cuberite,Fighter19/cuberite,guijun/MCServer,Altenius/cuberite,electromatter/cuberite,nounoursheureux/MCServer,mmdk95/cuberite,linnemannr/MCServer,jammet/MCServer,ionux/MCServer,nicodinh/cuberite,mmdk95/cuberite,thetaeo/cuberite,electromatter/cuberite,Haxi52/cuberite,Haxi52/cuberite,nicodinh/cuberite,johnsoch/cuberite,HelenaKitty/EbooMC,nichwall/cuberite,nichwall/cuberite,Howaner/MCServer,birkett/MCServer,electromatter/cuberite,Howaner/MCServer,Schwertspize/cuberite,birkett/cuberite,Haxi52/cuberite,zackp30/cuberite,ionux/MCServer,tonibm19/cuberite,jammet/MCServer,mc-server/MCServer,tonibm19/cuberite,birkett/MCServer,guijun/MCServer,zackp30/cuberite,Altenius/cuberite,mjssw/cuberite,Howaner/MCServer,birkett/cuberite,Tri125/MCServer,johnsoch/cuberite,Frownigami1/cuberite,mjssw/cuberite,HelenaKitty/EbooMC,bendl/cuberite,QUSpilPrgm/cuberite,Tri125/MCServer,Frownigami1/cuberite,nounoursheureux/MCServer,mc-server/MCServer,ionux/MCServer,Tri125/MCServer,nounoursheureux/MCServer,kevinr/cuberite,jammet/MCServer,Schwertspize/cuberite,thetaeo/cuberite,mc-server/MCServer,mjssw/cuberite,HelenaKitty/EbooMC,ionux/MCServer,nicodinh/cuberite,nounoursheureux/MCServer,nevercast/cuberite,birkett/cuberite,QUSpilPrgm/cuberite,Altenius/cuberite,SamOatesPlugins/cuberite,nicodinh/cuberite,linnemannr/MCServer,Tri125/MCServer,nichwall/cuberite,mmdk95/cuberite,Altenius/cuberite,kevinr/cuberite,thetaeo/cuberite,kevinr/cuberite,Frownigami1/cuberite,QUSpilPrgm/cuberite,SamOatesPlugins/cuberite,Haxi52/cuberite,marvinkopf/cuberite,Tri125/MCServer,mc-server/MCServer,nevercast/cuberite,guijun/MCServer,nounoursheureux/MCServer,mc-server/MCServer,guijun/MCServer,thetaeo/cuberite,Fighter19/cuberite,SamOatesPlugins/cuberite,bendl/cuberite,linnemannr/MCServer,birkett/MCServer,marvinkopf/cuberite,Haxi52/cuberite,nichwall/cuberite,jammet/MCServer,johnsoch/cuberite,marvinkopf/cuberite,linnemannr/MCServer,Howaner/MCServer,ionux/MCServer,nevercast/cuberite,bendl/cuberite,electromatter/cuberite,Howaner/MCServer,Altenius/cuberite,guijun/MCServer,mjssw/cuberite,Haxi52/cuberite,mjssw/cuberite,Fighter19/cuberite,zackp30/cuberite,HelenaKitty/EbooMC,Frownigami1/cuberite,mmdk95/cuberite,tonibm19/cuberite,HelenaKitty/EbooMC,mc-server/MCServer,birkett/MCServer,zackp30/cuberite,bendl/cuberite,birkett/cuberite,QUSpilPrgm/cuberite,birkett/cuberite,Schwertspize/cuberite,tonibm19/cuberite,tonibm19/cuberite,QUSpilPrgm/cuberite,Schwertspize/cuberite,SamOatesPlugins/cuberite,zackp30/cuberite,thetaeo/cuberite,ionux/MCServer,guijun/MCServer,kevinr/cuberite,QUSpilPrgm/cuberite,marvinkopf/cuberite,nichwall/cuberite,Fighter19/cuberite,Fighter19/cuberite,nounoursheureux/MCServer,linnemannr/MCServer,nevercast/cuberite,linnemannr/MCServer,marvinkopf/cuberite,nicodinh/cuberite,mmdk95/cuberite,johnsoch/cuberite,nevercast/cuberite,zackp30/cuberite,bendl/cuberite,thetaeo/cuberite,kevinr/cuberite,birkett/MCServer,birkett/MCServer,mmdk95/cuberite,Schwertspize/cuberite,Howaner/MCServer,Frownigami1/cuberite,tonibm19/cuberite,jammet/MCServer,electromatter/cuberite,mjssw/cuberite,marvinkopf/cuberite,nicodinh/cuberite,jammet/MCServer,Fighter19/cuberite