add some link to definition of the XPLs

Author: innovimax

README.md

@@ -5,3 +5,8 @@ XProc various inputs and samples
 
 The goal here is to provides samples of XProc Pipelines with various use
 
+ * factorial.xpl : to compute http://en.wikipedia.org/wiki/Factorial
+ * fizzbuzz.xpl	 : http://en.wikipedia.org/wiki/Bizz_buzz
+ * quicksort.xpl : http://en.wikipedia.org/wiki/Quicksort
+ * quine.xpl     : http://en.wikipedia.org/wiki/Quine_(computing)
+