Syntax for CLI on readme is out of date, -o doesnt accept two arguments

It seems like the syntax in the github readme is out of date. from the readme 
img2texture source.jpg seamless.jpg --overlap 0.25  
but from the CLI itself 
img2texture [-h] [-o OVERLAP] [-t] [--version] source target 

Also there doesnt seem to be a way to onlu pass the horizontal tile option in the CLI