Prs3d_Drawer getters now return NULL instead of implicitly creating "default" aspects.
Added missing initialization of default properties in AIS_InteractiveContext.
AIS_InteractiveContext::setContextToObject() - added missing propagation of Context to child presentations.
Adaptor2d_Curve2d, Adaptor3d_Curve and Adaptor3d_Surface now inherit Standard_Transient.
Interfaces Adaptor2d_HCurve2d, Adaptor3d_HCurve, Adaptor3d_HSurface and their subclasses
are now aliases to Adaptor2d_Curve2d, Adaptor3d_Curve and Adaptor3d_Surface.
Removed numerous unsafe reinterpret casts.
Generic classes Adaptor3d_GenHCurve, Adaptor3d_GenHSurface, Adaptor2d_GenHCurve2d have been removed.
Several redundant .lxx files have been merged into .hxx.
Removed obsolete adaptor classes with H suffix.
Broken custom presentations Sample2D_Text and ISession_Text
have been replaced by AIS_TextLabel.
ISession2D_Curve::Compute() - fixed defining the group without presentation aspects.
GeomSources - fixed assigning custom attributes.
Some warnings were removed from MFC samples
All warnings of sample projects with warning level 4 were fixed on VC9
Warnings level increased to -W4 in projects of MFC samples; sample ReadMe files added to documentation
Changes in Viewer2dDoc.cpp and OcafDoc.cpp were restored.
Minor corrections in documentation
CMake meta-projects for samples were added
launch script for samples was added
unrelated changes: CSF_GraphicShr variable were removed
occt building with cmake article was updated
