Add `examples` test file, start with a comments test

examples/comments.mustache

+<h1>{{title}}{{! just something interesting... #or not... }}</h1>

examples/comments.py

+import pystache
+
+class Comments(pystache.View):
+    template_path = 'examples'
+
+    def title(self):
+        return "A Comedy of Errors"

tests/test_examples.py

+import unittest
+import pystache
+
+from examples.comments import Comments
+
+class TestView(unittest.TestCase):
+    def test_comments(self):
+        self.assertEquals(Comments().render(), """<h1>A Comedy of Errors</h1>
+""")