Fix doc links to Shinken and zope.interface

Closes https://bugs.launchpad.net/graphite/+bug/992979

Author: mleinart

docs/install.rst

@@ -117,4 +117,4 @@ Post-Install Tasks
 .. _Twisted: http://twistedmatrix.com/
 .. _txAMQP: https://launchpad.net/txamqp/
 .. _uWSGI: http://projects.unbit.it/uwsgi/
-.. _zope.interface: http://pypi.python.org/pypi/zope.interface/
+.. _zope-interface: http://pypi.python.org/pypi/zope.interface/

docs/tools.rst

@@ -162,7 +162,7 @@ Scales
 
 Shinken
 -------
-`Shinken_` is a system monitoring solution compatible with Nagios which emphasizes scalability, flexibility,
+`Shinken`_ is a system monitoring solution compatible with Nagios which emphasizes scalability, flexibility,
 and ease of setup. Shinken provides complete integration with Graphite for processing and display of
 performance data.
 
@@ -210,3 +210,4 @@ Tasseo
 .. _Hubot: https://github.com/github/hubot
 .. _hubot-scripts: https://github.com/github/hubot-scripts
 .. _Tasseo: https://github.com/obfuscurity/tasseo
+.. _Shinken: http://www.shinken-monitoring.org/