Added experimental support for Tcl/Tk

[torstenberg]

I do not know how to add this to the code base (never used GIT or GitHub before), but I have added simple, yet incomplete, support for Tcl. Since version 7 of Komodo Edit this was missing but now I can finally update to Komodo Edit 9!

I just cannot find out how to also show the Tcl [proc] parameters in the source tree but maybe anyone here can help? Anyway, here’s the patched NST.xpi file:

http://www.typoscriptics.de/misc/NST-Tcl.xpi

Please include this into the code on GitHub if you find it useful.