Read icons from qa_errors.json when building data

Also adds support for the following error types:
- Objects mapped as both node/area or way/area
- Power lines that lead to nowhere
- Extra nodes in power lines (which should only go from support to
support to endpoint)
- Power line supports with no power lines

css/65_data.css

@@ -174,6 +174,14 @@
     color: #2D9359;
 }
 
+.osmose.category-4080 {
+    color: #F2F230;
+}
+
+.osmose.category-7040 {
+    color: #9F16B4;
+}
+
 .osmose.category-8300,
 .osmose.category-8360 {
     color: #3DE736;