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/ShapeUpgrade/ShapeUpgrade.cdl

@@ -68,14 +68,11 @@ is
     	class ShapeDivideArea;
     
     class ShapeDivideContinuity;    
-    	---Purpose: API Tool for converting shapes with C0 geometry into C1 ones
-    
+
     class ShapeDivideAngle;
-    	---Purpose: API Class for splitting revolutions to segments less than 90
 
     class ShapeConvertToBezier;
-    	---Purpose: API Class for convering curves to beziers.
-	
+
     class ShapeDivideClosed;
     	---Purpose:
 	
@@ -97,18 +94,16 @@ is
 	class SplitSurfaceArea;
 	
     class ShellSewing;
-    	---Purpose: Provides access to a sewing algorithms from BRepOffsetAPI
+
     class FixSmallCurves;
     ---Purpose:
     class FixSmallBezierCurves;
     ---Purpose:
     
     class RemoveLocations;
-    ---Purpose: Removes all locations sub-shapes of specified shape
-    
+
     class RemoveInternalWires;
-    ---Purpose: Removes all internal wires having area less than specified min area
-    
+
     class UnifySameDomain;
     ---Purpose: Unifies same domain faces and edges of specified shape
     

src/ShapeUpgrade/ShapeUpgrade_ShapeDivideAngle.cdl

@@ -19,7 +19,7 @@ class ShapeDivideAngle from ShapeUpgrade inherits ShapeDivide from ShapeUpgrade
 	---Purpose: Splits all surfaces of revolution, cylindrical, toroidal, 
     	--          conical, spherical surfaces in the given shape so that 
 	--          each resulting segment covers not more than defined number 
-	--          of degrees. 
+	--          of degrees (to segments less than 90).
 
 uses
     

src/ShapeUpgrade/ShapeUpgrade_ShapeDivideContinuity.cdl

@@ -16,7 +16,7 @@
 
 class ShapeDivideContinuity from ShapeUpgrade inherits ShapeDivide from ShapeUpgrade
 
-	---Purpose: 
+	---Purpose: API Tool for converting shapes with C0 geometry into C1 ones
 
 uses