DOC: add another link for diagmagic.py

Author: mgeier

doc/alternatives.rst

@@ -24,6 +24,7 @@ please add them with a PR_ or create an issue_.
 * https://gist.github.com/psychemedia/3abf1c671b39666860a8
 * https://gist.github.com/nilp0inter/7acfa98ef0302cebe1a7
 * https://gist.github.com/sherdim/f0293bc7b022b852185b
+* https://github.com/ricardodeazambuja/ipython-diags
 
 Related to ``https://bitbucket.org/vladf/ipython-diags`` (dead link)?