Add support for getting line number of executing code

[marinier]

We are building a debugger that includes support for Tcl code, using jtcl to provide the Tcl support. We need to sometimes know the line number of a proc that is being executed. The most recent versions of Tcl have an "info frame" command that we could use (e.g., see http://stackoverflow.com/questions/27834094/getting-the-line-number-of-executing-code-in-tcl). However, this does not seem to be supported in jtcl.

Are there plans to add support for "info frame", or any other means of getting the line number (possibly via the java API)?