Remove the deprecated interface members 'd' and 'CoordType'

They have been deprecated since the last release, since they actually
appeared twice in the class interface.
Improve doxygen documentation of class QuadraturePoint
Remove 1d quadrature rule 'Gauss', 'Jacobian_1_0', and 'Jacobian_2_0'

They have been superseded by 'GaussLobatta', 'GaussJacobi_1_0', and
'GaussJacobi_2_0', respectively.