Set up Grunt

Fixing up Grunt file to watch for directories

Exclude node modules folder from Jekyll built site

node_modules/csswring/test/fixtures/invalid-keyframe.css

@@ -0,0 +1,21 @@
+@keyframes foo {
+  from {
+    top: 0px;
+  }
+
+  50%, to {
+    top: 100px;
+  }
+
+  bar {
+    top: 999px;
+  }
+
+  101% {
+    top: 101px;
+  }
+
+  25%, 75%, -25% {
+    top: 50px;
+  }
+}