added OpenStreetMap Monochrome

Author: napo

data_sources/osm_monochrome/metadata.ini

@@ -1,20 +1,12 @@
+[tms]
+url = http://a.tiles.wmflabs.org/bw-mapnik/{z}/{x}/{y}.png
+
 [general]
 id = osm_monochrome
 type = TMS
 is_contrib = True
 
 [ui]
 group = osm
-alias = Openstreetmap monochrome
-icon =  osm_monochrome_symbol.png
-
-[license]
-name = 
-link = 
-copyright_text =
-copyright_link = 
-terms_of_use = 
-
-[tms]
-url = http://{s}.tiles.wmflabs.org/bw-mapnik/{z}/{x}/{y}.png
-zmax = 20
+alias = OpenStreetMap monochrome
+icon = osm_monochrome_symbol.png