Increased label's buffer size

Prevent label clipping by increasing all buffers
for the label layers to the maximum. This increases
the tile size somewhat, and we will need to optimize
the exact size at a later time.

data.xml

@@ -600,7 +600,7 @@ SELECT osm_id, way, admin_level, 0 AS maritime /* TODO */
   </Layer>
 
 <Layer name="country_label"
-  buffer-size="8"
+  buffer-size="64"
   srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
 
     <Datasource>
@@ -634,7 +634,7 @@ SELECT osm_id, way, name AS name_en, CASE
   </Layer>
 
 <Layer name="place_label"
-  buffer-size="8"
+  buffer-size="64"
   srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
 
     <Datasource>
@@ -688,7 +688,7 @@ SELECT osm_id, way, name AS name_en, place AS "type",
   </Layer>
 
 <Layer name="road_label"
-  buffer-size="8"
+  buffer-size="64"
   srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
 
     <Datasource>

data.yml

@@ -653,7 +653,7 @@ Layer:
       osm_id: Number
       scalerank: Number
     properties: 
-      "buffer-size": 8
+      "buffer-size": 64
     srs: +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over
   - id: place_label
     Datasource: 
@@ -712,7 +712,7 @@ Layer:
       osm_id: Number
       type: String
     properties: 
-      "buffer-size": 8
+      "buffer-size": 64
     srs: +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over
   - id: road_label
     Datasource: 
@@ -836,7 +836,7 @@ Layer:
       reflen: Number
       shield: String
     properties: 
-      "buffer-size": 8
+      "buffer-size": 64
     srs: +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over
 maxzoom: 16
 minzoom: 0