warnings during `python setup.py upload_doc`

[asottile]

/home/asottile/workspace/libsass-python-release/docs/index.rst:0: WARNING: nonlocal image URI found: https://travis-ci.org/dahlia/libsass-python.svg
/home/asottile/workspace/libsass-python-release/docs/index.rst:0: WARNING: nonlocal image URI found: https://ci.appveyor.com/api/projects/status/yghrs9jw7b67c0ia/branch/master?svg=true
/home/asottile/workspace/libsass-python-release/docs/index.rst:0: WARNING: nonlocal image URI found: https://img.shields.io/coveralls/dahlia/libsass-python/master.svg
/home/asottile/workspace/libsass-python-release/docs/index.rst:0: WARNING: nonlocal image URI found: https://badge.fury.io/py/libsass.svg
/home/asottile/workspace/libsass-python-release/sassutils/wsgi.py:docstring of sassutils.wsgi.SassMiddleware:25: ERROR: Unexpected indentation.
/home/asottile/workspace/libsass-python-release/sassutils/wsgi.py:docstring of sassutils.wsgi.SassMiddleware:28: WARNING: Block quote ends without a blank line; unexpected unindent.
/home/asottile/workspace/libsass-python-release/sassutils/wsgi.py:docstring of sassutils.wsgi.SassMiddleware:28: WARNING: Inline emphasis start-string without end-string.
/home/asottile/workspace/libsass-python-release/sassutils/wsgi.py:docstring of sassutils.wsgi.SassMiddleware:45: WARNING: Definition list ends without a blank line; unexpected unindent.
/home/asottile/workspace/libsass-python-release/sassutils/wsgi.py:docstring of sassutils.wsgi.SassMiddleware:47: ERROR: Unexpected indentation.

[asottile]

The first ones are solved with this:

diff --git a/docs/conf.py b/docs/conf.py
index b1882d5..9814f48 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,6 +26,8 @@ import sass
 # If your documentation needs a minimal Sphinx version, state it here.
 needs_sphinx = '1.3'
 
+suppress_warnings = ['image.nonlocal_uri']
+
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.intersphinx',