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there's a link "Write, review and proof the documentation" to http://docs.scipy.org/numpy/.
I suggest to use the file in the doc root:https://github.com/numpy/numpy/tree/master/doc
to create a nice and RST-based documentation guideline.
Could you expand a bit on what you are proposing?
I'm guessing that the suggestion is to include part of http://docs.scipy.org/numpy/Front%20Page/ in https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt