Updated README.md

Author: rmilesson

README.md

@@ -1,4 +1,16 @@
-ExampleAngularApplication
+ng-annotate
 =========================
 
-An example Angular application
+
+# Annotation colors
+
+Main annotation class is `.ng-annotation`
+An annotation is extended by adding a type class to `.ng-annotation`.
+Available type classes are
+	
+	.red - Sets background to red, color to white and border-color to red.
+	.green - Sets background to green, color to white and border-color to green.
+	.blue - Sets background to blue, color to white and border-color to blue.
+	.pink - Sets background to pink, color to white and border-color to pink.
+	.yellow - Sets background to yellow, color to black and border-color to yellow. 
+