ReadsToDistmap: do not require maxReadLength

[robmaz]

-maxReadLength appears to be a required option, but why?

[magicDGS]

Can you provide more information? I need the command line that you use and which error was produced after running it. Thanks!

[magicDGS]

By the way, it isn't an argument in the ReadsToDistmap, but an argument of the ReadLengthReadFilter.

As an optional filter for the trim/filter pipeline on uploading, if you specify --readFilter ReadLengthReadFilter you should also provide --maxReadLength to select the maximum-length to keep on uploading.