[libchamplain] Add <description> to the doap file

[Jiří Techet <jiritechet src gnome org>]

commit 8b78c7b10d4a19335fc09c72a9384abd5d8d83c3
Author: Jiří Techet <techet gmail com>
Date:   Thu Sep 7 00:09:32 2017 +0200

    Add <description> to the doap file

 libchamplain.doap |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/libchamplain.doap b/libchamplain.doap
index 88ca898..ec587ab 100644
--- a/libchamplain.doap
+++ b/libchamplain.doap
@@ -6,6 +6,10 @@
 
   <name xml:lang="en">libchamplain</name>
   <shortdesc xml:lang="en">A map widget</shortdesc>
+  <description>libchamplain is a Clutter based actor and a GTK widget displaying
+interactive maps. Various map sources can be used together with the possibility
+to draw custom overlays, markers and lines on top of the maps. Bindings to other
+languages are provided using GObject Introspection.</description>
   <category rdf:resource="http://api.gnome.org/doap-extensions#core"; />
   <programming-language>C</programming-language>
   <homepage rdf:resource="https://wiki.gnome.org/Projects/libchamplain"; />