Add custom titles/descriptions to articles

Change-Id: I7a9bef821d8d7e1fa2e7bb29da4ead0f255da9ed
diff --git a/mkdocs.yml b/mkdocs.yml
index d86e8e6..f7d0b72 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -24,6 +24,7 @@
   - pymdownx.superfences
   - pymdownx.keys
   - pymdownx.details
+  - meta
 nav:
   - 'Sobre esta web': 'index.md'
   - 'Chrome':