Small rewording of the page subtitle, added mention to the Agency the…

…me to the readme

README.md

@@ -1,6 +1,8 @@
 # OMS Developer Website
 Observations, Measurements and Samples (OMS) developer website
 
+The theme used is a Node/Pug to Jekyll conversion of the [Agency](https://startbootstrap.com/theme/agency) one page HTML theme for Bootstrap by [Start Bootstrap LLC](https://startbootstrap.com/). 
+
 The contributor understands that any contributions, if accepted by the OGC Membership, MAY be incorporated into OGC documents and that all copyright and intellectual property SHALL be vested to the OGC.
 
 ## Powered by GitHub Pages and Jekyll

docs/_data/front.yml

@@ -1,6 +1,6 @@
 heading:
   main-heading: "Observations, Measurements and Samples (OMS)"
-  sub-heading: "The standard model for describing and exchanging observational data (development in progress)"
+  sub-heading: "The Standard for describing and exchanging observational data (development in progress)"
 buttons:
 - href: "#why"
   title: "Tell me more"