Single Branch Stimulation Experiments

[HOC] A_freq.hoc
[EXE] run_A_freq
[HOC] A+Bfreq.hoc
[EXE] run_A+Bfreq
[HOC] A+Cfreq.hoc
[EXE] run_A+Cfreq
[HOC] A_shock.hoc
[EXE] run_A_shock
[HOC] A+Cshock.hoc
[EXE] run_A+Cshock