dispersion_analysis.py: update, rename process_eigs() -> process_evp_results()
dispersion_analysis.py: update, rename process_eigs() -> process_evp_results()

rc/sfepy,vlukes/sfepy,BubuLK/sfepy,BubuLK/sfepy,rc/sfepy,sfepy/sfepy,vlukes/sfepy,sfepy/sfepy,vlukes/sfepy,sfepy/sfepy,BubuLK/sfepy,rc/sfepy