Added air, farmland and tilleddirt to items.ini.
Added air, farmland and tilleddirt to items.ini.

Air hasn't been present at all, the others are usual synonyms.

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