Overriding hardcoded -B values is possible from command line

[edawson]

Hi @brentp ,

While testing this, I noticed that it's possible to pass -B <N> at the command line and override the -B 2 value set in bwa-meth.py. Is this intended behavior to allow users to override -B, or should it always be fixed to -B 2 for things to properly function?

Thanks, Eric