added info about --mt (multithreading) option
added info about --mt (multithreading) option

jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler,jniemann66/ReSampler