Anvil saver pads data to 4K boundaries.
Anvil saver pads data to 4K boundaries.

Fixes #524.

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