update lua-scripts:

* add an inline spectrum display
* fix re-init HP/LP and Biquad
* add some comments, labels etc

scripts/remove_unknown_procs.lua

@@ -7,15 +7,19 @@ ardour { ["type"] = "EditorAction", name = "Remove Unknown Plugins",
 }
 
 function factory (params) return function ()
+	-- iterate over all tracks and busses
 	for route in Session:get_routes ():iter () do
+		-- route is-a http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Route
 		local i = 0;
 		repeat
 			proc = route:nth_processor (i)
+			-- proc is a http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:Processor
+			-- try cast it to http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:UnknownProcessor
 			if not proc:isnil () and not proc:to_unknownprocessor ():isnil () then
 				route:remove_processor (proc, nil, true)
 			else
 				i = i + 1
 			end
-		until proc:isnil()
+		until proc:isnil ()
 	end
 end end