API Add ResultsReader.toMatlab method
API Add ResultsReader.toMatlab method

Directly export the contents of a results reader to a
matlab file using scipy.io.savemat.

The group constant data will be presented as a multi-dimensional
array, rather than a stacked 2D matrix. The axis are ordered
``burnup, universeIndex, group, value/uncertainty``

CORE-GATECH-GROUP/serpent-tools,CORE-GATECH-GROUP/serpent-tools