added gzip and bzip 2 as a requirement for centos
added gzip and bzip 2 as a requirement for centos

dgibbs64/linuxgsm,GameServerManagers/LinuxGSM,dgibbs64/linuxgsm,Maxximou5/linuxgameservers,GameServerManagers/LinuxGSM,Maxximou5/linuxgameservers