allow output to be selected from repl

Author: Andrew Schmadel

index.html

@@ -93,7 +93,7 @@ <h3>Errors</h3>
         lineNumbers: true,
         matchBrackets: true,
         continueComments: "Enter",
-        readOnly: 'nocursor'
+        readOnly: true
 	};
 
 	var input = CodeMirror(document.getElementById('input'), inputOpts);