GeneralisedLambdaDistribution
                         The Generalised Lambda Distribution
rgld                     random numbers from the generalised lambda distribution
qgld                     quantiles of the generalised lambda distribution
pgld                     probabilities of the generalised lambda distribution
dgld                     densities of the generalised lambda distribution
qdgld                    quantile densities of the generalised lambda 
			 distribution
gl.check.lambda          Function to check the validity of parameters of
                         the generalized lambda  distribution
