[evince] Update README.md

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 3f78e617979b2c6a42827693342eed66f9e98c0e
Author: Germán Poo-Caamaño <gpoo calcifer org>
Date:   Wed May 23 19:10:38 2018 +0000

    Update README.md

 README.md | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)
---
diff --git a/README.md b/README.md
index 1317cdb9..dc1f99c0 100644
--- a/README.md
+++ b/README.md
@@ -3,18 +3,23 @@
 Evince is a document viewer capable of displaying multiple and single
 page document formats like PDF and Postscript.  For more general
 information about Evince please visit our website at 
-https://wiki.gnome.org/Apps/Evince
+https://wiki.gnome.org/Apps/Evince.
 
-This software is licensed under the GPLv2.
+This software is licensed under the [GPLv2][license].
 
 ## Evince Requirements
 
-GNOME Platform libraries [ http://www.gnome.org/start/ ]
-Poppler for PDF viewing [ http://poppler.freedesktop.org/ ]
-GhostScript for Postscript viewing [ http://pages.cs.wisc.edu/~ghost/ ]
+* [GNOME Platform libraries][gnome]
+* [Poppler for PDF viewing][poppler]
+* [GhostScript for Postscript viewing][ghostscript]
 
 ## Evince Optional Backend Libraries
 
-DjVuLibre for DjVu viewing [ http://djvulibre.djvuzone.org/ ]
+* [DjVuLibre for DjVu viewing][djvulibre]
 
+[gnome]: https://www.gnome.org/start/
+[poppler]: https://poppler.freedesktop.org/
+[ghostscript]: http://pages.cs.wisc.edu/~ghost/
+[djvulibre]: https://djvulibre.djvuzone.org/
+[license]: COPYING
 [evince-logo]: data/icons/48x48/apps/evince.png