Add dimensioned drawing.

Author: kaklik

doc/img/TFGPS01_dimensions.png

@@ -1,11 +1,11 @@
 {
   "board": {
-    "active_layer": 0,
+    "active_layer": 19,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],
     "hidden_nets": [],
-    "high_contrast_mode": 0,
+    "high_contrast_mode": 1,
     "net_color_mode": 1,
     "opacity": {
       "images": 0.6,
@@ -47,7 +47,7 @@
       "drc_exclusions",
       "shapes"
     ],
-    "visible_layers": "00000000_00000000_0003f3fc_a20800ff",
+    "visible_layers": "00000000_00000000_0003f3f4_a20800ff",
     "zone_display_mode": 0
   },
   "git": {