Pip in nightly build not working

[ihnorton (Isaiah Norton)]

@lassoan

Would it make sense to add Slicer launcher application shortcut for pip? Pip could then launched as: Slicer.exe --pip install…

I think Slicer --launch already prefers binaries in Slicer’s PATH, so the other option is to document pip as Slicer --launch pip (only a few more characters).