A weird character was between 'ArgumentError' and the equals sign, causing the test to fail... And no, I don't consider a space a weird character ;-)

Signed-off-by: Erik de Bruin <erik@ixsoftware.nl>
Added default values for 'sdk-js-lib' and 'closure-lib' config settings, such that when the compiler is part of the FlexJS SDK, there is no need to explicitly set these paths.

Signed-off-by: Erik de Bruin <erik@ixsoftware.nl>