Added tons more asserts to bytebuffer
Added tons more asserts to bytebuffer

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