Force creation of point elements

[jginternational]

Fixes #997

[jginternational]

@AlejandroCornejo

With this feature, conditions with topology Point, like PointLoad2D in structural will print Point as geometry

GiDInterface/kratos.gid/apps/Structural/xml/Conditions.xml

Line 64 in 8d5cabe

<item GeometryType="Point" nodes="1" KratosName="PointLoadCondition2D1N"/>

This is the format:

Begin Geometries Point2D // GUI group identifier: Load on points Auto1
    4227 3700
End Geometries
Begin SubModelPart Load_on_points_Auto1 // Group Load on points Auto1
    Begin SubModelPartNodes
         3700
    End SubModelPartNodes
    Begin SubModelPartGeometries
         4227
    End SubModelPartGeometries
End SubModelPart

Could you test it @AlejandroCornejo ?

[jginternational]

@AlejandroCornejo si te parece bien le doy