added VTKMeshIO.read_data() - works with point data only
added VTKMeshIO.read_data() - works with point data only

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