Handling of output stokes (polarization) parameters is now a float4
vector. This is more suitable to the information it presents.

STI outputs are now ordered differently to have the stokes values
contiguous in memory grouped by beam, then frequency, then sti time
sample output.

The rtbf host output memory is now (void*) intending to indicate to the
user the output format changes based on operational mode. The internals
handle conversion and sizing. Memory lenghts are now all bytes, except
for the input/output_offset that are not sized in bytes for convenience
to the user in doing pointer arithmetic.