add note about pete vnc ;; source, but no explanation for switch

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+# Switch
+
+Limbo does not have a verbatim `switch` statement. Rather, it has a statement named `case` which is analogous, but not identical to C's switch-case construct. 
+
+Limbo case statements break by default and accept range matching operations involving the `or` and `to` keywords.
+
+Note: A break or continue followed by a label causes a break out of, or the next iteration of, the enclosing construct that is labeled with the same label. 
+
+## Source
+
+### switch.b:16,31
+
+
+
+### switch.b:33,42
+
+
+
+### switch.b:44,51
+
+
+
+### switch.b:53,60
+
+
+
+### switch.b:62,69
+
+
+
+## Demo
+
+	; limbo switch.b
+	; switch
+	Even
+	Odd
+	i's value: 9
+	Valid hex
+	Quack!
+	This is binary
+	Neither 4 nor 7
+	; 
+
+## Exercises
+
+- Try commenting out the `break` and/or `continue` keywords in the first switch, how does the behavior change?