0025418: Debug output to be limited to OCC development environment

Macros ending on "DEB" are replaced by OCCT_DEBUG across OCCT code; new macros described in documentation.
Macros starting with DEB are changed to start with "OCCT_DEBUG_".
Some code cleaned.

src/IntAna/IntAna_Curve.cxx

@@ -14,7 +14,7 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
-#ifndef DEB
+#ifndef OCCT_DEBUG
 #define No_Standard_RangeError
 #define No_Standard_OutOfRange
 #endif

src/IntAna/IntAna_Int3Pln.cxx

@@ -12,7 +12,7 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
-#ifndef DEB
+#ifndef OCCT_DEBUG
 #define No_Standard_RangeError
 #define No_Standard_OutOfRange
 #endif

src/IntAna/IntAna_IntConicQuad.cxx

@@ -14,7 +14,7 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
-#ifndef DEB
+#ifndef OCCT_DEBUG
 #define No_Standard_RangeError
 #define No_Standard_OutOfRange
 #endif

src/IntAna/IntAna_IntQuadQuad.cxx

@@ -18,7 +18,7 @@
 
 #include <Standard_Stream.hxx>
 
-#ifndef DEB
+#ifndef OCCT_DEBUG
 #define No_Standard_RangeError
 #define No_Standard_OutOfRange
 #endif

src/IntAna/IntAna_QuadQuadGeo.cxx

@@ -19,7 +19,7 @@
 //--          If the intersection is not a conic, 
 //--          analytical methods must be called.
 //----------------------------------------------------------------------
-#ifndef DEB
+#ifndef OCCT_DEBUG
 #define No_Standard_RangeError
 #define No_Standard_OutOfRange
 #endif

src/IntAna/IntAna_Quadric.cxx

@@ -14,7 +14,7 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
-#ifndef DEB
+#ifndef OCCT_DEBUG
 #define No_Standard_RangeError
 #define No_Standard_OutOfRange
 #endif