adding links to PyConWeb talk and slides

Author: mahmoud

docs/index.rst

@@ -12,13 +12,19 @@ simplicity and correctness for both :ref:`URIs and IRIs <uris_and_iris>`.
 
 Hyperlink is tested against Python 2.7, 3.4, 3.5, and PyPy.
 
+For an introduction to the hyperlink library, its background, and URLs
+in general, see `this talk from PyConWeb 2017`_ (and `the accompanying
+slides`_).
+
 .. _RFC 3986: https://tools.ietf.org/html/rfc3986
 .. _RFC 3987: https://tools.ietf.org/html/rfc3987
+.. _this talk from PyConWeb 2017: https://www.youtube.com/watch?v=EIkmADO-r10
+.. _the accompanying slides: https://speakerdeck.com/mhashemi/urls-in-plain-view
 .. |release| image:: https://img.shields.io/pypi/v/hyperlink.svg
              :target: https://pypi.python.org/pypi/hyperlink
 
 .. |calver| image:: https://img.shields.io/badge/calver-YY.MINOR.MICRO-22bfda.svg
-            :target: http://calver.org
+   :target: http://calver.org
 
 
 Installation and Integration