Updated QuickStart links + a typo fix

QuickStart links pointed to 404s; also, “relatively links” → “relative links”

Author: acusti

README.md

@@ -107,7 +107,7 @@ Some web browsers (e.g., Chrome) require secondary files to be loaded from a
 web server for security reasons.  This means loading a web page that references
 a Processing.js sketch in a file via a file:/// URL vs. http:// will fail. You
 are particularly likely to run into this problem when you try to view your
-webpage directly from file, as this makes all relatively links file:/// links.
+webpage directly from file, as this makes all relative links file:/// links.
 
 There are several ways to get around this problem. You can use a browser which
 does allow file:/// access, although most current browsers either have, or plan
@@ -128,10 +128,10 @@ you turn it back on. While "easy", this is unsafe.
 Learn More About Processing.js
 -------------------------------
 Processing developers should start with the Processing.js Quick Start Guide for
-Processing Developers at http://processingjs.org/reference/articles/p5QuickStart.
+Processing Developers at http://processingjs.org/articles/p5QuickStart.html
 
 JavaScript developers should start with the Processing.js Quick Start Guide for
-JavaScript Developers at http://processingjs.org/reference/articles/jsQuickStart
+JavaScript Developers at http://processingjs.org/articles/jsQuickStart.html
 
 A more detailed guide is http://processingjs.org/articles/PomaxGuide.html