Makefile now has a depend line, which uses mkdep (which is on freebsd 10, not sure who else has the same command...)

modified speed increases to always change by a set amount, but will set it to the minimum if it's lower (lots of changing and re-setting, but at the late game it should just always be a true if, so able to be piped well...didn't like having 2 if's for that).