Added several new export methods that manipulate matrix operations.
Improved undo history - The redo stack is now cleared when more items are added to the undo stack. Entities added by the 'MergeDocument 'method are now also added to the undo stack inside a single group.
The 'select' command of 'vdcanvas.scriptCommand.parseCommands' now supports 'grip' parameter.
Added a new 'ActiveSelectionModify' event to 'vdcanvas.scriptCommand' object.