xtra Param -- version 0.3
*externalParamName any paramNameOrNum
*externalParamValue string param
*externalParamCount

This scripting xtra overwrites the 3 Lingo "externalParam..." functions with a
custom implementation, that uses parameters defined in a [Params] section of the
current projector-INI. This allows to run DCRs originally meant for web-usage
only in a projector environment.

Shortcomings:

- Only works if the DCR calls the "externalParam..."-functions as global
  functions, and not as methods of the _player object.

- Not Unicode-safe yet - so at the moment it can't be used with Non-ASCII
  characters neither in the projector name/path nor in the parameter values.