add diff/diff.d.ts

diff/diff-tests.ts

@@ -0,0 +1,14 @@
+/// <reference path="./diff.d.ts" />
+
+import jsdiff = require('diff');
+
+var one = 'beep boop';
+var other = 'beep boob blah';
+
+var diff = jsdiff.diffChars(one, other);
+
+diff.forEach(function (part) {
+    var mark = part.added ? '+' :
+        part.removed ? '-' : ' ';
+    console.log(mark + " " + part.value);
+});