resview.py: update read_mesh() to support any SfePy mesh format
resview.py: update read_mesh() to support any SfePy mesh format

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