[vtkusers] VTK_WRAP_TCL2

[Barry Hathaway]

I'm in the process of upgrading an old project from VTK 4.4 to the 
latest VTK and
I'm having problems with several CMake files. They contain a call to the 
CMake
extension VTK_WRAP_TCL2 which was removed from VTK at about 5.0.
Would someone tell me the history behind VTK_WRAP_TCL2 such as what it
was used for, why it was removed, and what is used as its replacement. I 
can't
seem to find any documentation on it.  Thanks.

Barry Hathaway