docs: fix broken references

docs/contributing.rst

@@ -45,7 +45,7 b' To get started with Kallithea developmen'
 If you plan to use Bitbucket_ for sending contributions, you can also fork
 Kallithea on Bitbucket_ first (https://bitbucket.org/conservancy/kallithea) and
 then replace the clone step above by a clone of your fork. In this case, please
-see :ref:`contributing-guidelies` below for configuring your fork correctly.
+see :ref:`contributing-guidelines` below for configuring your fork correctly.
 
 
 Contribution flow

docs/usage/email.rst

@@ -93,4 +93,4 b' References'
 - `ErrorHandler (Pylons modules documentation) <http://pylons-webframework.readthedocs.org/en/latest/modules/middleware.html#pylons.middleware.ErrorHandler>`_
 
 
-.. _WebError: https://pypi.python.org/pypi/WebError
+.. _backlash: https://github.com/TurboGears/backlash