add Jason to credits, etc.

AUTHORS.md

@@ -5,6 +5,7 @@ The PRIMARY AUTHORS are (and/or have been):
 * Manuel Aristarán - La Nación (Buenos Aires, Argentina), Knight-Mozilla OpenNews
 * Mike Tigas - ProPublica, Knight-Mozilla OpenNews
 * Jeremy B. Merrill - The New York Times (formerly ProPublica)
+* Jason Das, designer <https://jasondas.com>
 * David Frackman
 * Travis Swicegood - Texas Tribune
 

webapp/index.html

@@ -339,7 +339,7 @@ <h2>Who Uses Tabula?</h2>
             <p>And researchers of all kinds use Tabula to turn PDF reports into Excel spreadsheets, CSVs, and JSON files for use in analysis and database applications.</p>
 
             <h2>Credits</h2>
-            <p>Tabula was created by <a href="http://jazzido.com/" target="_blank">Manuel Aristarán</a>, <a href="https://mike.tig.as/" target="_blank">Mike Tigas</a> and <a href="http://jeremybmerrill.com/" target="_blank">Jeremy B. Merrill</a> with the support of <a href="http://propublica.org">ProPublica</a>, <a href="http://blogs.lanacion.com.ar/data/">La Nación DATA</a>, <a href="http://www.mozillaopennews.org/">Knight-Mozilla OpenNews</a>, <a href="http://nytimes.com">The New York Times</a> and <a href="http://www.knightfoundation.org/">The Knight Foundation</a>.</p>
+            <p>Tabula was created by <a href="http://jazzido.com/" target="_blank">Manuel Aristarán</a>, <a href="https://mike.tig.as/" target="_blank">Mike Tigas</a> and <a href="http://jeremybmerrill.com/" target="_blank">Jeremy B. Merrill</a> with the support of <a href="http://propublica.org">ProPublica</a>, <a href="http://blogs.lanacion.com.ar/data/">La Nación DATA</a>, <a href="http://www.mozillaopennews.org/">Knight-Mozilla OpenNews</a>, <a href="http://nytimes.com">The New York Times</a> and <a href="http://www.knightfoundation.org/">The Knight Foundation</a>. Tabula was designed by <a href="http://jasondas.com">Jason Das.</a></p>
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