fix omitting nodes of boundary conditions in Mesh.write()
fix omitting nodes of boundary conditions in Mesh.write()

- add nodal_bcs argument to Mesh.from_data()

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