[PATCH 1 of 2] setup: don't constrain docutils version

[Andrew Shadura]

# HG changeset patch
# User Andrew Shadura <andrew at shadura.me>
# Date 1484423808 -3600
#      Sat Jan 14 20:56:48 2017 +0100
# Node ID 15b013ad9029d572633c5e915a36058ab6fa53aa
# Parent  1ab38cd7270481c09e1adbef0d84d8d9dbef37f4
setup: don't constrain docutils version

Docutils maintains stable interface, and seems to be developed
at slow enough pace, so we can drop the upped version restriction.

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,7 @@ requirements = [
     "babel>=0.9.6,<=1.3",
     "python-dateutil>=1.5.0,<2.0.0",
     "markdown==2.2.1",
-    "docutils>=0.8.1,<=0.11",
+    "docutils>=0.8.1",
     "URLObject==2.3.4",
     "Routes==1.13",
     "dulwich>=0.14.1",