Fixed bug in eval_der.
Fixed evaluation of lambda function.
Testderivative works properly.
Legendre Vector Space
Update test_legendre_vector_space.py

fixed wrong collocation points in the test file
Update legendre_vector_space.py

fix in the number of dof for Legendre space
Update test_legendre_vector_space.py
Update test_legendre_vector_space.py
Update test_legendre_vector_space.py
Merge pull request #35 from gpitton/legendre_space

Legendre Vector Space
Merge pull request #34 from ESeNonFossiIo/fix-derivative

Fix derivative