Added 'newlines' option to function underline
Better error reporting for options framework
Added some basic quadrature functions (Newton-Cotes, interval shifting, weights)
Fixed the shape of x and w in polysys_int_rule
Fixed some issues with shape of integration nodes and weights
Wrote some help for the gauss_legendre_triangle_rule function and made it faster.
Added Fejer rules to Clenshaw-Curtis methods
Examples can now end with a Note section in run_example
Better coverage for some quadrature methods