+ better exception handling in Part module
+ fixes #0001816: parseQuantity returns garbage
+ improve plane fit
+ fix various rendering problems
Part: ModelRefine: Enhancement for cylindrical faces
Part: ModelRefine: fix for missing tolerances.
Part: ModelRefine: Add FixMissingSeam
Part: ModelRefine: adding bspline support
Part: ModelRefine: Test files
Part: ModelRefine: Fix for avoid edges of edgeFuse not working
Unit.cpp/Unit.h: Added get...Dimension() function calls for missing elements of unit signature.
Initial commit for Spreadsheet module (C++ version).
Added PropertyQuantity to the type system.
Fixed spreadsheet import/export functions.
Fixed spreadsheet "open" command.
Added recompute() calls to spreadsheet commands.
Fixed isTouched() methods in Expression class hierarchy.
Implemented FunctionExpression::toString().
Moved Expression classes into Spreadsheet module.
Added FIXME for later.