Improved support for joining curve
Added support for curve joining
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Test for Multicurve joining
Added support for MultiCurve joining
Improved paragraph dedicated to smoothness-coeff editing
Changed PsTricks to PSTricks.
Changed PsTricks to PSTricks + added localized entries.
Weeded old code related to parametricplot
Fixed bug with psline formatting (was: inner points were output twice) [Jobst]