6 - better handling of ifdef on statements in control flow graph.
7 - transform files even if they do not end in .c (thanks to Vegard Nossum)
15 - support for initializer at toplevel, cf -test substruct
19 ** first public release of the source code:
22 - embeded python scripting
27 ** first public release of the binary
32 - lots of features ... look at coccinelle research papers and tutorials.