Console: Connect server to parser and executor

Console: Implement skeletal console server
Console: Implement a rudimentary test server

Console: Implement very (very) fundamental node tree
Console: Implement parser

INet6Address(in6_addr in6a)

Utils: BUGFIX: Fix use of operator<< together with throw

Socket: Fix NetDeviceController.test.cc (use 'lo' interface instead of 'wlan0'
Socket/Protocols/MPEGDVBbundle: Fix TransportPacket.test.cc (add 0 to constant to fix link error)

   - renamed "description()" member to "errorString()", 
   - renamed "where" attribute to "description", 
   - changed "what()" ouptut.

Utils/Logger: Add some internal implementation documentation concerning SENF_LOG_CLASS_AREA()

Utils/Logger: Renoame all 'SENF_LOG_DEF_*' macros to 'SENF_LOG_DEFINE_*'
Utils/Logger: Add documentation on default compile-time limit

Socket/Protocols/INet: Fix INet6SocketAddress base classes