Move each rule implementation into its own file (fixes #83).

lib/md034.js

@@ -0,0 +1,29 @@
+// @ts-check
+
+"use strict";
+
+var shared = require("./shared");
+
+module.exports = {
+  "names": [ "MD034", "no-bare-urls" ],
+  "description": "Bare URL used",
+  "tags": [ "links", "url" ],
+  "function": function MD034(params, onError) {
+    shared.filterTokens(params, "inline", function forToken(token) {
+      var inLink = false;
+      token.children.forEach(function forChild(child) {
+        var match = null;
+        if (child.type === "link_open") {
+          inLink = true;
+        } else if (child.type === "link_close") {
+          inLink = false;
+        } else if ((child.type === "text") &&
+                    !inLink &&
+                    (match = shared.bareUrlRe.exec(child.content))) {
+          shared.addErrorContext(onError, child.lineNumber, match[0], null,
+            null, shared.rangeFromRegExp(child.line, shared.bareUrlRe));
+        }
+      });
+    });
+  }
+};