Implementation of respiration and partitioning:
 - well, at least a start ...
 - implmented L5qc in qcls.py as a processing step.
 - created qcrp.py to hold functions relating to respiration and
   partitioning.
 - implemented estimation of respiration using SOLO using similar
   approach to use of SOLO for gap filling
 - implemented estimation of respiration using FFNET using similar
   approach to use of SOLO for gap filling
 - implemented partioning.
 - both estimation of respiration and partitioning are controlled
   via an L5 control file.
 - an arbitrary number of respiration and partitioning outputs
   can be specified.
 - placeholders inserted for Lloyd-Taylor and Lasslop et al.