Corrections to support old results in geometry samples: added ISession_Direction::SetLineAspect(); ISession_Direction class in Modeling sample was corrected.
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