we are keeping two things in the contrib directory
1) the library-of-babel.org file, this is with the goal of lowering
the barrier of entry for contribution of functions to the library
of babel
2) we are also keeping a langs directory in the contrib directory
because some language files do not have FSF copyright assignment
-- current org-babel-oz.el is the only such file
Variable names in gnuplot source code preceded by the '$' character
will be expanded to their value before the code is executed. For
example the following will results in the evaluation of 'plot
sin(x)' by gnuplot.
"sin(x)"
plot $fun