Merged in issue865VeritonImport (pull request #427)
Primary purpose of pull request is to allow Spectrum Dynamics RDSRs to be imported.
Secondary change is to tidy up imports etc in rdsr.py
Refs #865
Primary purpose of pull request is to allow Spectrum Dynamics RDSRs to be imported.
Secondary change is to tidy up imports etc in rdsr.py
Refs #865