Changes

0033446: Modeling Alghorithms - Creating offset with one of the degenerated edge leads to crash

Added condition to prevent out of range error

0033449: Modeling Algorithm - Crash in BRepTools_GTrsfModification::NewTriangulation() method

Changed iteration limits from theTriangulation->NbTriangles() to theTriangulation->NbNodes()
Provided modification of the normals only with rotation (gp_GTrsf::Form() == gp_Other  leads to crash)

0033450: Modeling algorithm - HLR algorightm stucks

Selecting the middle point between XInf and XSup leads situation, where X values almost does not change.
To prevent this situation, select shifted point instead of middle.

0033183: Data Exchange - Lose texture after saving XBF file

Texture reading and writing changed in VisMaterial drivers

0033351: Data Exchange, Step - Improvement for thread safety of the STEP translator

Local StepData_Factors object usage for each session
Static variables isolated