Updated docs and added constants to tracker

doc/doc_files/scope.html

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 		 The above program WILL NOT COMPILE. That is because the variable B was created inside the scope of the WHILE loop and nothing outside the WHILE loop will be able to access it.  The variable A was created outside the WHILE loop so the variable A could be used anywhere in this example.  So a variable can go into a deeper scope than where it was created but it cannot go to a lesser scope than where it was created.  A scope deepens every time a new block is started.  Blocks refer to the code within a loop, within a Function, or within a Sub Routine. 
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