Operators for Pre-Syn-Post Conversion

pre2post_sum	The pre-to-post synaptic summation.
pre2post_prod	The pre-to-post synaptic production.
pre2post_max	The pre-to-post synaptic maximization.
pre2post_min	The pre-to-post synaptic minimization.
pre2post_mean	The pre-to-post synaptic mean computation.
pre2post_event_sum	The pre-to-post event-driven synaptic summation with CSR synapse structure.
pre2post_csr_event_sum	The pre-to-post event-driven synaptic summation with CSR synapse structure.
pre2syn	The pre-to-syn computation.
syn2post_sum	The syn-to-post summation computation.
syn2post	The syn-to-post summation computation.
syn2post_prod	The syn-to-post product computation.
syn2post_max	The syn-to-post maximum computation.
syn2post_min	The syn-to-post minimization computation.
syn2post_mean	The syn-to-post mean computation.
syn2post_softmax	The syn-to-post softmax computation.