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.
1) Generic classes:
"GccGeo_Circ2dTanOn",
"GccGeo_Circ2d2TanRad",
"GccGeo_Circ2d2TanCen",
"GccGeo_Circ2d2TanOnRad",
"GccGeo_CurvePGTool"
from "GccGeo" package converted to the non-generic classes and moved to the "Geom2dGcc" package. Names of this classes were changed to:
"Geom2dGcc_Circ2dTanOnGeo",
"Geom2dGcc_Circ2d2TanRadGeo",
"Geom2dGcc_Circ2d2TanCenGeo",
"Geom2dGcc_Circ2d2TanOnRadGeo",
"Geom2dGcc_CurveToolGeo".
Also "GccGeo_PanGenCurve" unused generic class was deleted. And "GccGeo" package was deleted.
