Update donate link

Fixes #614

docs/index.html

@@ -91,9 +91,6 @@ Papa.parse(bigFile, {
 								<a href="http://stackoverflow.com/questions/tagged/papaparse">
 									<i class="fa fa-stack-overflow fa-lg"></i> Help
 								</a>
-								<!-- <a href="https://matt.life/pay" class="donate">
-									<i class="fa fa-heart fa-lg"></i> Donate
-								</a> -->
 							</div>
 						</div>
 					</div>
@@ -534,7 +531,7 @@ var csv = Papa.unparse(yourData);</code></pre>
 						</div>
 						<div class="grid-15 mobile-grid-50 links">
 							<h5>Project</h5>
-							<a href="https://gratipay.com/mholt">Donate</a>
+							<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=S6VTL9FQ6L8EN&item_name=PapaParse&currency_code=EUR&source=url">Donate</a>
 							<a href="https://github.com/mholt/PapaParse">GitHub</a>
 							<a href="https://twitter.com/search?q=%23PapaParse">Share</a>
 						</div>