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)

Changed all exceptions to inherit from senf::Exception
Replaced all throwErrno() calls with throw SystemException()

Replace all 'throw SystemException(...)' commands with 'throwErrno(...)'
Add additional links to documentation header

Examples/RateStuffer: Use CloneSource module
Exmaples/RateStuffer: Implement using a RateStuffer subnet
PPI: Implement CloneSource
PPI: Add throttle()/unthrottle() to passive debug modules
PPI: Implement DiscardSink
PPI: Implement ThrottleBarrier
PPI: Implement missing unit tests
PPI: Complete the documentation
Scheduler: Improve ClockService performance and remove a race condition
Scheduler: Clean up Scheduler::process()
Utils: Make singleton::instance() protected by default and fix implementation
Remove private members from doxygen documentation

Unified emacs Local Variables

Renaned directory satscons to senfscons

Implemented EAGAIN / EWOULDBLOCK and EINTR handling
Made the generic connect implementation always block
Implemented SocketHandle::state() infrastructure

started ClientSocketHandle generic interface

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