initial commit
inital untested version of the tcp packet database.
Fixing the README. It gave the impression that this code was stable.
Adapted filtering's pipeline to the packet queue.
Fixed several errors.
improve the pkt_queue, it's adapted for new code, needs revision, this may not compile.
Merge branch 'tcp_store_packet' into issue58

Conflicts:
	README
	mod/core.c
	mod/filtering_and_updating.c
My first revision of the packet queue.
Since it's not being called, it's not doing much. I'm just
commiting because the new, "remove" function has prompted me to
turn it into a tree.
added a rb_tree in pktqueue for efficient removal.
Merge branch 'issue58' into fragments_experiment

Conflicts:
	include/nat64/comm/config_proto.h