Update INSTALL_OSX.md
Update INSTALL_OSX.md

Added minimum version 0.10.4 as it is now the min req. Newer modules are now in use, necessitating 0.10.4
buttercoin/buttercoin,eXcomm/buttercoin,bankonme/buttercoin,eXcomm/buttercoin,buttercoin/buttercoin,buttercoin/buttercoin-engine,bankonme/buttercoin