Make the changelog link to github issues/pull requests. [skip ci]

doc/conf.py

@@ -37,10 +37,16 @@ if not os.path.exists('changelog.rst') and os.path.exists('../changelog.rst'):
 
 # 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.doctest', 'sphinx.ext.coverage', 'sphinx.ext.intersphinx', 'mysphinxext']
+extensions = ['sphinx.ext.autodoc', 'sphinx.ext.doctest', 'sphinx.ext.coverage', 'sphinx.ext.intersphinx', 'mysphinxext',
+              'sphinx.ext.extlinks']
 
 intersphinx_mapping = {'http://docs.python.org/': None}
 
+extlinks = {'issue': ('https://github.com/gevent/gevent/issues/%s',
+                      'issue #'),
+            'pr':    ('https://github.com/gevent/gevent/pull/%s',
+                      'pull request #')}
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
@@ -55,7 +61,7 @@ master_doc = 'contents'
 
 # General information about the project.
 project = u'gevent'
-copyright = u'2009-2011, gevent contributors'
+copyright = u'2009-2015, gevent contributors'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the