[guadec-web/oscp-2019] Replace Google maps with OpenStreetMap

[Tom Tryfonidis <tomtryf src gnome org>]

commit c68709b9166b11e864ca84d2c4b089be0864bd66
Author: Tom Tryfonidis <tomtryf gmail com>
Date:   Sat Jun 29 12:04:29 2019 +0300

    Replace Google maps with OpenStreetMap

 content/pages/accommodation.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/content/pages/accommodation.md b/content/pages/accommodation.md
index 439d9f9..481ae15 100644
--- a/content/pages/accommodation.md
+++ b/content/pages/accommodation.md
@@ -97,8 +97,9 @@ In order to book a room and get the GUADEC rates, please use the **attendee's re
 
 Ionos Dragoumi 61, Thessaloniki 546 30, Greece
 
-<iframe width="600" height="450" frameborder="0" style="border:0"
-src="https://www.google.com/maps/embed/v1/place?q=place_id:ChIJoTyXpKg5qBQRwausfzIwVok&key=AIzaSyDJ2nSh9DIbhjtwgj8m8bwFeza5Rj95TiU";
 allowfullscreen></iframe>
+<iframe width="100%" height="450" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" 
src="https://www.openstreetmap.org/export/embed.html?bbox=22.936411499977115%2C40.63724135595246%2C22.945370078086853%2C40.64100264952594&amp;layer=mapnik";></iframe>
+<small><a 
href="https://www.openstreetmap.org/?mlat=40.63919&amp;mlon=22.94225#map=18/40.63919/22.94225&amp;layers=N";>View
 Larger Map</a>, <a href="https://goo.gl/maps/iebEbhPWziR4vBH8A";>View on Google Maps</a></small>
+
 
 ## How to arrive