add evalpy: a tool I've been using for interactive debugging
add prod
symvar and findsym

symvar doesn't quite match matlab order (sorting code looks suspect for capital letters).  I left some xtest for it
Fix Issue #25, syms beta fails
add mod, and a helper routine for applying binary ops

FIXME: times and others could use this
bernouilli

note, not in @sym b/c it can be called with a double
fibonacci and tests for fib and bern
nextprime, isprime
contributors list
start documenting differences with matlab SMT
make sure unit tests have at least one comment line, quiet packaging warnings
display/disp/pretty: better newline handling
comment header updates
evalpy: give stored values a more unique name

evalpy records the original values to see if it needs to assign them
Fix (I think) Bug #26, allow % in python code

Basically, stop sprintf'ing everywhere (well, the various IPC code might still do this, but I don't feel like digging, good enough for now)
and now mod can use % :)
Note test failure on old Octave, rephrase a warning, and comments update
refactor display code and add custom empty sym display
stop using temp files for system() ipc.

I thought I had to do it this way but it was either b/c of pickles or more likely my kludgy python debugging script I had in the middle...