Aa/3887/packet filter v2

Here is pull request with new Packet Filter app.
PacketFilter generates code of its conform() method on the fly during construction.

I use 2 files from  http://wiki.wireshark.org. They are GPL licensed.
GPL requires to include full license text, but wiki.wireshark.org only contains the link.
I also include the link to http://wiki.wireshark.org/License, not the full GPL text.