Removed zvsh.py

Now it's in separate repository. This version is outdated and shouldn't be used anymore.
See zerovm/zerovm-cli repo at github.
Added Tcl port.

Added tcl port from original source code. Focusing on 8.5 version.
There is NaTcl project which is also port of tcl, ignoring it for now.
Merge pull request #2 from rampage644/master

Adding tcl port, removing outdated zvsh.py