fix integrate_in_time() to work for coefficients of any dimension
fix integrate_in_time() to work for coefficients of any dimension

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