Begin working on asyncio port.

docs/conf.py

@@ -32,12 +32,19 @@ sys.path.insert(0, os.path.abspath('..'))
 extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.extlinks',
+    'sphinx.ext.napoleon',
 ]
 
 extlinks = {
     'issue': ('https://github.com/Rapptz/discord.py/issues/%s', 'issue '),
 }
 
+rst_prolog = """
+.. |coro| replace:: This function is a |corourl|_.
+.. |corourl| replace:: *coroutine*
+.. _corourl: https://docs.python.org/3/library/asyncio-task.html#coroutine
+"""
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']