Added depreciation message

Author: Corey White

index.html

@@ -1,3 +1,7 @@
+<h1 style="color: red; font-size: 24px;">Depreciated</h1>
+
+<p style="font-size: 18px;">Updated materials can be found at: <a href="https://ncsu-geoforall-lab.github.io/gis-584-uas-course/" style="color: blue;">https://ncsu-geoforall-lab.github.io/gis-584-uas-course/</a></p>
+
 <h2>Mapping and Analytics Using UAS</h2>
 
 <h3>Course description</h3>