5 - a lot of functions moved to src/numth.lisp
9 (only two small bug-fixes)
11 - gf_set with 2 arguments should work now
15 - the two packages (gf.mac, gf_roots.mac) have been merged
17 - there are two test files with lots of examples
19 - gf_set takes now also 2 arguments (no redundant degree)
20 and 1 argument (for GF(p))
22 - new routines for modular roots
24 - faster primitive element search
26 - much faster discrete logarithm
28 - fast Fibonacci and Lucas sequences
30 - some bugs have been fixed