dispersion_analysis.py: allow passing wdir as argument to assemble_matrices()
dispersion_analysis.py: allow passing wdir as argument to assemble_matrices()

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