update ANSYSCDBMeshIO.read() to determine true number of fields
update ANSYSCDBMeshIO.read() to determine true number of fields

- fixes reading files with wrong nblock/eblock information
- update make_format()

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