First commit of partial RosettaCode contents.

Pushing this for testing purposes. Lots of work still needed.

Task/Knuth_shuffle/Python/knuth_shuffle.py

@@ -0,0 +1,10 @@
+from random import randrange
+
+def knuth_shuffle(x):
+    for i in range(len(x)-1, 0, -1):
+        j = randrange(i + 1)
+        x[i], x[j] = x[j], x[i]
+
+x = list(range(10))
+knuth_shuffle(x)
+print("shuffled:", x)