0022651: Impossible to build OCC as static library due to using Standard_EXPORT instead of Standard_API

All library-specific macros for defining export / import properties of symbols on Windows (like Standard_API, __Draw_API, _math_API etc.) are eliminated.
Common macro Standard_EXPORT is used in all places where it is necessary.

New macro OCCT_STATIC_BUILD is defined for disabling Standard_EXPORT, to be used instead of HAVE_NO_DLL, though the latter is still supported as well (for compatibility).

To allow building OCCT in static mode on Windows after these changes:
- Files OSD_WNT_1.hxx and OSD_WNT_BREAK.hxx are removed; useful declarations are moved to OSD_WNT.hxx
- In the class IVtkVTK_ShapeData, static fields ARRNAME_MESH_TYPES and ARRNAME_SUBSHAPE_IDS are converted to static inline functions
- Global array ChoixRef defined in IntImp_ComputeTangence.cxx is converted to static function returning element of the array by index
- Unused class Quantity_Convert is removed (it had static field accessed by inline method)
- Struct Approx_Data defined in the same way in BRepApprox_Approx.hxx and GeomInt_WLApprox.hxx is made private member of these classes to avoid name clash
- Some C++ files producing no object code are removed
- In NCollection_EBTree.hxx and StdLPersistent_Collectio.hxx, definition of template virtual method is moved to class definition to avoid MSVC linker warnings on unused symbols

src/StdLPersistent/StdLPersistent_Collection.cxx

@@ -68,18 +68,6 @@ private:
   Handle(TDF_Data) myDF;
 };
 
-//=======================================================================
-//function : Read
-//purpose  : Read persistent data from a file
-//=======================================================================
-template <class Base>
-void StdLPersistent_Collection::booleanArrayBase<Base>::Read
-  (StdObjMgt_ReadData& theReadData)
-{
-  Base::Read (theReadData);
-  theReadData >> myLower >> myUpper;
-}
-
 template <class Base>
 template <class ArrayHandle, class Converter>
 void StdLPersistent_Collection::booleanArrayBase<Base>::import

src/StdLPersistent/StdLPersistent_Collection.hxx

@@ -47,7 +47,11 @@ class StdLPersistent_Collection
   {
   public:
     //! Read persistent data from a file.
-    Standard_EXPORT virtual void Read (StdObjMgt_ReadData& theReadData);
+    virtual void Read (StdObjMgt_ReadData& theReadData)
+    {
+      Base::Read (theReadData);
+      theReadData >> myLower >> myUpper;
+    }
 
   protected:
     template <class ArrayHandle, class Converter>