These interpreted source files are read by yorick as it starts.  The
files themselves contain extensive documentation comments.

paths.i     -- read before anything else, allows adjustments to paths
std.i       -- standard built in yorick functions (yorick/)
graph.i     -- standard graphics functions (yorick/)
matrix.i    -- linear algebra functions (matrix/)
fft.i       -- FFT functions (fft/)
stdx.i      -- final startup file, changes path to proper value