Add image credit

whereswaldon · whereswaldon · commit bca2ba71d0fc · 2019-05-04T15:02:40.000-04:00
diff --git a/img/about.txt b/img/about.txt
@@ -0,0 +1 @@
+The Arbor logo was conceived on a chalkboard by Katerina Waldon and digitized by Chris Waldon.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+The Arbor logo was conceived on a chalkboard by Katerina Waldon and digitized by Chris Waldon.`