added simple block mesh generator
added simple block mesh generator

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