PPI: Allow IOEvents to be constructed with an in-valid() handle
Socket/Protocols/INet: Implement INet6Address::from_mac()
Socket/Protocols/Raw: Implement LLSocketAddress output streaming

Make all include path's relative
Add 'senf/Packets.hh', 'senf/PPI.hh' and 'senf/Socket.hh'

Socket/Protocols/INet: Add INet4Address documentation
Fix some missed INet4Address -> INet4SocketAddress renames
Fixed several std:string arguments to use std::string const &

Socket: Added complete MACAddress class
Packets/DefaultBundle: Make EthernetPacket use the MACAddress class

Unified emacs Local Variables

Set fixed column width in member docs

Renaned directory satscons to senfscons

implemented rudimentary PacketSocketHandle testing

added listen to ConnectedCommunicationPolicy
added primitive doxygen documentation
cleaned up naming of some files
fixed INetProtocol.cc (missing const modifiers)
removed SocketProtcolHelper in favor of directly inheriting SocketProtocol virtually
moved implementation of TCPv4SocketProtocol virtual methods into the base classes
added rudimentary testing of the TCPv4SocketHandle protocol interface
finalized PacketSocketHandle