Adding form builder docs to the readme file

README.md

@@ -21,6 +21,18 @@ The following is a basic example of how to set up and use a go form
 
     form.addField(uname)
 
+### YAML Form builder
+You can create a yaml file to represent a form, passing this to builder will create a form with all its fields and validation rules specified, firstly you'll need to make a yaml form file, take a look at example.yml in the source code, after this pass it to the builder:
+
+    // Create a new builder
+    b := NewBuilder("example.yml", http.Request)
+    // Now the form can be built
+    b.build()
+
+    // Once the form is built you can access it through the builder
+    b.Form
+    b.Form.validate()
+
 ### Output
 The form struct will output the form tags, and each field can output the Html representation of itself, for example