+Log Window:
+
+DEBUG_0()
+Use DEBUG_0() only for temporary debugging i.e. not in code in the repository.
+The user will then not see irrelevant debug output when the default
+debug level = 0 is used.
+
+log_printf()
+If the first word of the message is "error" or "warning" (case insensitive)
+the message will be color-coded appropriately.
+
+--------------------------------------------------------------------------------
+
GPL header, in every file, like this:
/** \file