Remove typings folder, replace with tsd.json

Author: zhengbli

.travis.yml

@@ -1,4 +1,4 @@
 // Place your settings in this file to overwrite default and user settings.
 {
-	"editor.insertSpaces": true
+    "editor.insertSpaces": true
 }

.vscode/settings.json

@@ -0,0 +1,21 @@
+{
+  "version": "v4",
+  "repo": "borisyankov/DefinitelyTyped",
+  "ref": "master",
+  "path": "typings",
+  "bundle": "typings/tsd.d.ts",
+  "installed": {
+    "node/node.d.ts": {
+      "commit": "16134c168d021351acb1673ee9659644fc58c424"
+    },
+    "mocha/mocha.d.ts": {
+      "commit": "16134c168d021351acb1673ee9659644fc58c424"
+    },
+    "assertion-error/assertion-error.d.ts": {
+      "commit": "16134c168d021351acb1673ee9659644fc58c424"
+    },
+    "chai/chai.d.ts": {
+      "commit": "16134c168d021351acb1673ee9659644fc58c424"
+    }
+  }
+}