Add typings test setup

fixtures/typings-test/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "files": [
+      "typing-tests.ts"
+  ],
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es5"
+  }
+}

fixtures/typings-test/typing-tests.ts

@@ -0,0 +1,23 @@
+/// <reference path="../../typings/xterm.d.ts" />
+
+import { Terminal } from 'xterm';
+
+namespace constructor_tests {
+  {
+    new Terminal();
+    new Terminal({});
+    new Terminal({
+      cols: 1,
+      rows: 1
+    });
+    new Terminal({
+      'cols': 1,
+      'cursorBlink': true,
+      'cursorStyle': 'block',
+      'disableStdin': false,
+      'rows': 1,
+      'scrollback': 10,
+      'tabStopWidth': 2,
+    });
+  }
+}