README incorrectly mentions http://wheels.scipy.org/

[terencehonles]

This is probably related to https://github.com/matthew-brett/multibuild/issues/304

The readme probably should be referring to the following instead:

• Staging: https://anaconda.org/multibuild-wheels-staging/pandas/files
• Nightly: https://anaconda.org/scipy-wheels-nightly/pandas/files

Here is numpy's readme in case that is useful to copy from.