Improvements function plots in modules spectra and spectral energy budget
Created originally on Bitbucket by calpe (Miguel Calpe)
Was already merged in Bitbucket before import, marked as merged by the import user
- Improvement method _get_concatenate_data in spatio_temporal_spectra.py.
- Translation scaling k**-3 with argument level3.
- Correction title Spectral energy budget.
- Remove total spectra + add Ozmidov.