-Create a new package BRepPreviewAPI, inherited from BRepPrimAPI to create both, valid and degenerative shapes
-Create a new class BRepPreviewAPI_MakeBox for working with a box
Preview can be vertex, edge, rectangle or box
-BRepPrim_GWedge: in the case of non-valid data, the exception does not happen in the constructor, but at the moment of access to the shape
-BRepPrimAPI_MakeBox: myWedge is now not private, but protected, because used in BRepPreviewAPI_MakeBox which inherits from BRepPrimAPI_MakeBox
-Add tests for checking of a creation a preview in tests/geometry/preview (vertex, edge, rectangle, box)
-Update a command "box": add new parameters
Generic classes "LProp_FuncCurExt", "LProp_FuncCurNul" and "LProp_NumericCurInf" from "LProp" package converted to the non-generic classes and moved to the "Geom2dLProp" package. Therefore names of this classes were changed to "Geom2dLProp_FuncCurExt", "Geom2dLProp_FuncCurNul" and "Geom2dLProp_NumericCurInf".
Generic class "Sweep_LinearRegularSweep" from "Sweep" package converted to the non-generic classes and moved to the "BRepSweep" package. Therefore name of this class was changed to "BRepSweep_NumLinearRegularSweep". Also 2 internal classes of "BRepSweep_NumLinearRegularSweep" moved to "BRepSweep.cdl".
Generic classes "Primitives_Wedge" and "Primitives_OneAxis" from "Primitives" package converted to the non-generic classes and moved to the "BRepPrim" package. Therefore names of this classes were changed to "BRepPrim_GWedge" and "BRepPrim_OneAxis". Also enum "Direction" moved to BRepPrim. Therefore all "Primitives" package was deleted.
And some other minor changes were done.
Internal classes Array2OfShapes and SequenceOfShapes from BRepSweep_NumLinearRegularSweep replaced to Array2OfShape and SequenceOfShape from TopTools.
