cc/azure: revision graph

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less more | rev 20: (0) -10 -3 +3 +10 +30 tip

try to use dateparser.parse on non-standard last-modified
Sat, 20 Oct 2018 16:13:58 +0000, by Henry S. Thompson
lots of tweaking, reached the 80/20 point
Sat, 20 Oct 2018 16:11:29 +0000, by Henry S. Thompson
F2-related stuff, and new experiment
Fri, 19 Oct 2018 14:25:19 +0000, by Henry S. Thompson

less more | rev 20: (0) -10 -3 +3 +10 +30 tip