Added -x option
Added -x option

craigsapp/minHumdrum,craigsapp/humlib,humdrum-tools/minHumdrum,humdrum-tools/minHumdrum,craigsapp/humlib,craigsapp/minHumdrum,craigsapp/humlib,craigsapp/minHumdrum,humdrum-tools/minHumdrum