change name of illustration for package description

.gitattributes

@@ -4217,6 +4217,7 @@ Polyhedron/doc/Polyhedron/Concepts/PolyhedronItems_3.h -text
 Polyhedron/doc/Polyhedron/Concepts/PolyhedronTraits_3.h -text
 Polyhedron/doc/Polyhedron/PackageDescription.txt -text
 Polyhedron/doc/Polyhedron/Polyhedron.txt -text
+Polyhedron/doc/Polyhedron/fig/Polyhedron-teaser-small.gif -text svneol=unset#image/gif
 Polyhedron/doc/Polyhedron/fig/add_facet.pdf -text svneol=unset#application/pdf
 Polyhedron/doc/Polyhedron/fig/add_facet1.gif -text svneol=unset#image/gif
 Polyhedron/doc/Polyhedron/fig/add_facet2.gif -text svneol=unset#image/gif
@@ -4242,7 +4243,6 @@ Polyhedron/doc/Polyhedron/fig/shark.pdf -text svneol=unset#application/pdf
 Polyhedron/doc/Polyhedron/fig/subdiv.gif -text svneol=unset#image/gif
 Polyhedron/doc/Polyhedron/fig/subdiv.pdf -text svneol=unset#application/pdf
 Polyhedron/doc/Polyhedron/fig/subdiv_small.gif -text svneol=unset#image/gif
-Polyhedron/doc/Polyhedron/fig/teaser-small.gif -text svneol=unset#image/gif
 Polyhedron/doc/Polyhedron/fig/teaser.gif -text svneol=unset#image/gif
 Polyhedron/doc_tex/Polyhedron/fig/add_facet.ips -text svneol=unset#application/postscript
 Polyhedron/doc_tex/Polyhedron/fig/euler.ips -text svneol=unset#application/postscript

Polyhedron/doc/Polyhedron/PackageDescription.txt

@@ -5,7 +5,7 @@
 \addtogroup PkgPolyhedron
 \todo check generated documentation
 \PkgDescriptionBegin{3D Polyhedral Surface}
-\PkgPicture{teaser-small.gif}
+\PkgPicture{Polyhedron-teaser-small.gif}
 \PkgAuthor{Lutz Kettner}
 \PkgDesc{Polyhedral surfaces in three dimensions are composed of vertices, edges, facets and an incidence relationship on them. The organization beneath is a halfedge data structure, which restricts the class of representable surfaces to orientable 2-manifolds - with and without boundary. If the surface is closed we call it a polyhedron.}
 \PkgSince{1.0}