Reorganize validation code

Rename IssueManager to coreValidator
Rename disconnected highway to disconnected way
Rename highway almost junction to almost junction
Rename mapcss checks to maprules
Rename deprecated tags to deprecated tag

modules/validations/maprules.js

@@ -0,0 +1,25 @@
+import { services } from '../services';
+import {
+    ValidationIssueType
+} from '../core/validator';
+export function validationMaprules() {
+    var validation = function(entity, context) {
+        if (!services.maprules) return [];
+
+        var graph = context.graph();
+
+        var rules = services.maprules.validationRules();
+        var issues = [];
+
+        for (var i = 0; i < rules.length; i++) {
+            var rule = rules[i];
+            rule.findIssues(entity, graph, issues);
+        }
+
+        return issues;
+    };
+
+    validation.type = ValidationIssueType.maprules;
+
+    return validation;
+}