Merge pull request #308 from tony/pyup-update-sphinx-1.6.4-to-1.6.5

Update sphinx to 1.6.5

Author: tony

requirements/doc.txt

@@ -1,6 +1,6 @@
 -r ./base.txt
 docutils==0.14
-sphinx==1.6.4
+sphinx==1.6.5
 alagitpull==0.0.13 # Updated from 0.0.12
 releases==1.4.0 # Updated from 1.3.1
 aafigure==0.6