added mergetool files to gitignore
added mergetool files to gitignore

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