Fixed a typo in the Chebyshev lab.
Merge pull request #412 from insertinterestingnamehere/cheb

Fixed a typo in the Chebyshev lab.
Updated Sympy solutions.
Merge pull request #413 from insertinterestingnamehere/sympy

Updated Sympy solutions.
Merge pull request #415 from AZaitzeff/optim

Changed the lab significantly
The cvxopt lab is fully operational