fix ANSYSCDBMeshIO.read(), guess it with .inp suffix
fix ANSYSCDBMeshIO.read(), guess it with .inp suffix

- new .guess()
- for mixed element meshes and coordinates without "solid" keyword

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