Changes to 0.7.6 * Add QuadraticFormula, CubicFormula, PolynomialRoots, CommutationMatrix, ToeplitzMatrix, MakeVector, RiemannZeta, GammaFunction * Add --exec option to execute an expression from the command line * Add chapter to the documentation on plotting and other minor updates to the docs * Fix complex number handling in number of functions, particularly in all functions that use gaussian elimination and related routines * Translations updated a teeny bit (Michele Petrecca, me)