update table of 1_2 quadrature points
update table of 1_2 quadrature points

- fix and update module docstring
- update QuadraturePoints.__init__() - add symmetric argument
- up to polynomial order 47

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