Tcl is added using The Jim Interpreter. Jim is an opensource small-footprint
implementation of the Tcl programming language. It implements a large subset
of Tcl and adds new features like references with garbage collection,
closures, built-in Object Oriented Programming system, Functional Programming
commands, first-class arrays and UTF-8 support.
Signed-off-by: Carlos Sánchez de La Lama <csanchezdll@gmail.com>