0024784: Move documentation in CDL files to proper location

Mostly duplicated comments were removed and missing ones were moved
into dedicated class CDL files.
Some more duplicated comments were removed from CDL files.
Correction of merge

src/Intf/Intf.cdl

@@ -37,9 +37,6 @@ is
 --  Classes input data :
 
     deferred class Polygon2d;
-    ---Purpose: Describes the necessary polygon information to compute
-    --          the interferences.
-
 
     class Array1OfLin instantiates Array1 from TCollection
      	    	    (Lin from gp);
@@ -51,41 +48,28 @@ is
 --	Classes output data :
 
     class SectionPoint;
-    ---Purpose: Describes a common point between two polygons  or between a
-    --          polygon and a polyhedron.
 
     class SeqOfSectionPoint instantiates Sequence from TCollection
     	    	    	    	    	    (SectionPoint);
 
 
     class SectionLine;
-    ---Purpose: Describes a common line between two polyhedrons.
 
     class SeqOfSectionLine instantiates Sequence from TCollection
     	    	    	    	    	    (SectionLine);
 
 
     class TangentZone;
-    ---Purpose: Describes a zone  of tangence between two polygons  or  two
-    --          polyhedrons.
 
     class SeqOfTangentZone instantiates Sequence from TCollection
     	    	    	    	    	    (TangentZone);
 
 
     deferred class Interference;
-    ---Purpose: Describes  the Interference   computation result  as  three
-    --          sequences   of  points  of  intersection   ,  polylines of
-    --          intersection and zones de tangence.
-
 
 -- Algorithms :
 
     class Tool;
-    	---Purpose: The class tool  provide methods to  create Box  or
-    	--          Box2d in particular contex. 
-
-
 
 
     class InterferencePolygon2d;

src/Intf/Intf_Interference.cdl

@@ -17,7 +17,9 @@
 deferred class Interference from Intf
 
 	---Purpose: Describes the   Interference  computation    result
-	--          between polygon2d or polygon3d or polyhedron.
+	--          between polygon2d or polygon3d or polyhedron
+	--         (as  three sequences   of  points  of  intersection,
+	--          polylines of intersection and zones de tangence).
 
 uses    SectionPoint      from Intf,
     	SeqOfSectionPoint from Intf,

src/Intf/Intf_Polygon2d.cdl

@@ -15,7 +15,8 @@
 
 deferred class Polygon2d from Intf
 
-	---Purpose: 
+	---Purpose: Describes the necessary polygon information to compute
+    --        the interferences.
 
 uses Pnt2d from gp,
      Box2d from Bnd