Add .horde.yml file.

.horde.yml

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+---
+id: horde
+name: Horde
+full: Horde base application
+description: >
+  The Horde Application Framework is a flexible, modular, general-purpose web
+  application framework written in PHP. It provides an extensive array of
+  components that are targeted at the common problems and tasks involved in
+  developing modern web applications. It is the basis for a large number of
+  production-level web applications, notably the Horde Groupware suites. For
+  more information on Horde or the Horde Groupware suites, visit
+  http://www.horde.org.
+list:
+type: application