Update Potlatch 2 to 2.0-14-gc925264 build

public/potlatch2/imagery.xml

@@ -14,7 +14,7 @@
 	</set>
 	<set>
 		<name>OSM - Mapnik</name>
-		<url>http://tile.openstreetmap.org/$z/$x/$y.png</url>
+		<url>http://c.tile.openstreetmap.org/$z/$x/$y.png</url>
 	</set>
 	<set>
 		<name>OSM - Osmarender</name>
@@ -41,7 +41,7 @@
 	</set>
 	<set minlat="49.8" minlon="-9" maxlat="61.1" maxlon="1.9">
 		<name>OS 1:25k historic</name>
-		<url>http://ooc.openstreetmap.org/os1/$z/$x/$y.png</url>
+		<url>http://ooc.openstreetmap.org/os1/$z/$x/$y.jpg</url>
 		<sourcetag>OS 1:25k</sourcetag>
 	</set>
 	<set minlat="49.8" minlon="-9" maxlat="61.1" maxlon="1.9">