Added function for quantiles on scantwoperm objects
Added function for quantiles on scantwoperm objects

BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl,BackupTheBerlios/eqtl