Spikes are default in LIF neuron also if a realtime kernel is present.
Fixed name of -V --voltage-clamp option in stimulus and output. Added AO_CHANNEL_CC/VC.
Removed deprecated rc-write and extracellular protocol. Removed deprecated lcg-vcclamp.
Adjustments for AI/O_CHANNEL_CC/VC.
lcg-spontaneous support for AI_CHANNEL_CC/VC.
Rebased devellop, LIF neuron emits spikes in real experiments.