Rename IpV[46]* -> IPv[46]*

todo: add tests & documentation

Utils/Daemon: Last implementation fixes
Fix installation of some missing files

Scheduler: Add debug log message, fix signal handlin bug
Scheduler: Remove all registered handlers/callbacks/descriptors at end of unit test
Utils/Logger: Undef SENF_LOG_CONF if defined in main.test.hh
Scheduler: Moved Daemon class from Utils here. Can't be in Utils since it depends on the Scheduler :-(
Scheduler: Daemon class: Implemented correkt fork() and simple log-passing behaviour

Scheduler: Elaborate more on boost::bind usage
Utils: Start senf::Daemon base class
Utils/Logger: Make ConsoleTarget a singleton
Utils/Logger: Introduce fallback routing

Utils: Rename SafeBool to safe_bool (hmm ...)

Utils/Logger: FileTarget implementation

Packets/MPEGDVBBundle: Use senf::Parse_Variant in SNDUPacket

Packets: Move example policies into .dox files
Packets: Implement variant parser

Utils: Implement ErrnoException

Packets: Add parse helpers for private fields
Packets: Rename all SENF_PARSE_ parse helpers to SENF_PARSER_
Packets/MPEGDVBBundle: Fix parsers to make use of the new parse helper features
Add additional Doxygen predefined macros to correctly parse the packet parse helper macros

Packets: Add parse helper unit-test

Packets/DefaultBundle: Implement IpV6Packet, IpV6Extensions and UDPPacket's finalize()

Packets: Implemnet generic assignment of boost::optional's to parsers
Packets: Fix <n>_offset field definition in BOOST_PACKET_PARSER_DEFINE_FIELDS
Packets: Implement PacketTypeMixin::key() helper
Packets: Clarify documentation regiarding valid()/in-valid() packets
Packets/DefaultBundle: Implement EthernetPacket, EthVLanPacket and IpV4Packet's finalize()