Switch to using requests for better charset detection

Python requests does a better job of detecting the charsets of
webpages, performing automatic decoding when the text content is
requested, avoiding issues around needing to do detection.

This allows checking the following urls & anchors correctly:

    http://www.yaml.org/spec/1.2/spec.html#id2761803
    http://www.yaml.org/spec/1.2/spec.html#id2765878
    http://www.yaml.org/spec/1.2/spec.html#id2765878

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 8c10f1f63..e17b38728 100644
--- a/setup.py
+++ b/setup.py
@@ -49,6 +49,7 @@ requires = [
     'babel>=1.3,!=2.0',
     'alabaster>=0.7,<0.8',
     'imagesize',
+    'requests',
 ]
 extras_require = {
     # Environment Marker works for wheel 0.24 or later