Tweak examples in ponyville for shortcode

Author: mattstratton

exampleSite/content/events/2017-ponyville/registration.md

@@ -4,6 +4,9 @@ Type = "event"
 +++
 <h2>Registration</h2>
 
+Registation begins {{< registration_start >}}<br/>
+Registation ends {{< registration_end >}}
+
 {{< google_form "https://docs.google.com/forms/d/e/1FAIpQLScvv-ty_wEBlYkJaEC1OU0qqqbIHjf9JVa-Ptdo5TcHqz5EDA/viewform?usp=sf_link" >}}
 
 Registation begins {{< registration_start >}}

exampleSite/data/events/2017-ponyville.yml

@@ -9,8 +9,8 @@ cfp_date_end: 2017-06-15
 cfp_date_announce: 2017-01-01
 cfp_open: "true"
 cfp_link: ""
-registration_date_start:
-registration_date_end:
+registration_date_start: 2017-05-15
+registration_date_end: 2017-05-30
 registration_open: ""
 registration_closed: ""
 registration_link: ""