README: note that python 2.6 or 2.7 is required
README: note that python 2.6 or 2.7 is required

This is based on this detail from the node build information: https://github.com/nodejs/node/blob/33c27f8fcffd7b0c6d609fdd4503b4f7a3c45bcd/BUILDING.md

Trying to use python 3 when installing node currently does not do anything useful, hoping this can save somebody else a bit of time.
chriskuehl/nodeenv,chriskuehl/nodeenv,jhermann/nodeenv