David Shrewsbury 2e16b54f1b Update docs to reflect newer Python requirement.
We've shifted to supporting only Python 3 for nodepool. And
a recent change to use math.inf means we need at least python
version 3.5.

Change-Id: Ie3a56022d2bed3fa9b9fca0919158441c8c60017
2018-01-26 11:20:52 -05:00
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2015-06-02 19:08:07 +00:00
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