Update README with background information

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-# www
-Transaction portion of wikimedia.ca
+# Pre-2016 website
+
+## Overview
+This repository is the transaction portion of the website originally authored by Jeffery Nicholls.
+
+The purpose of this website was to provide an area outside the wikimedia.ca wiki for Paypal transactions such as joining the organization or making a donation.
+
+The folders contain the original Paypal button graphics with their original labels.
+
+The site had several issues:
+
+* The Paypal buttons all had the same `alt` text. Non-visual users had no way to distinguish the "Donate" button from the "Join" button.
+* The webpages were not correctly tagged for their language (English or French).
+* The French webpage used Unicode characters without a specified `charset`.
+
+This site was replaced in the fall of 2016.