Added js-beautify unit tests

There are only two: a simple string for the basic usage, and a full
string for the full usage. This should trigger Travis CI.

js-beautify/js-beautify-tests.ts

@@ -0,0 +1,28 @@
+/// <reference path="js-beautify.d.ts" />
+
+var simple: string = js_beautify("console.log('Hello world!');");
+
+var full: string = js_beautify(
+    "console.log('Hello world!');",
+    {
+        "indent_size": 4,
+        "indent_char": " ",
+        "eol": "\n",
+        "indent_level": 0,
+        "indent_with_tabs": false,
+        "preserve_newlines": true,
+        "max_preserve_newlines": 10,
+        "jslint_happy": false,
+        "space_after_anon_function": false,
+        "brace_style": "collapse",
+        "keep_array_indentation": false,
+        "keep_function_indentation": false,
+        "space_before_conditional": true,
+        "break_chained_methods": false,
+        "eval_code": false,
+        "unescape_strings": false,
+        "wrap_line_length": 0,
+        "wrap_attributes": "auto",
+        "wrap_attributes_indent_size": 4,
+        "end_with_newline": false
+    });