Allow ignoring of XML doc

[kentcb]

Hi,

It would be great if there was an option to allow XML doc to be ignored in the comparison. Ideally this option would appear after assemblies are chosen, thus allowing the user to turn it on and off for the current comparison without any need to re-select assemblies.

[tsviatko]

Moving the xml doc file outside the assembly folder should do the trick. It does not allow switching this on and off after assemblies are selected but it's a viable workaround.