dogtail-devel New example: gcalctool-test-fibonacci.py

[Dave Malcolm <dmalcolm redhat com>]

I committed a new example to CVS: a test for gcalctool which manually
calculates the Fibonacci series (by typing in the numbers, pressing
'add', and checking the results, in an infinite loop).

I accidentally left in running for 20 minutes and it was still working
for very large numbers, with no memory apparent leaks (yay!)