ChebyshevSpace -> Chebyshev
UltrasphericalSpace->Ultraspherical
ChebyshevDircihletSpace->ChebyshevDirichlet
JacobiWeightSpace->JacobiWeight
JacobiSpace->Jacobi
FourierSpace->Fourier
LaurentSpace->Laurent
TaylorSpace->Taylor
HardySpace->Hardy

Removed IFun
Merge pull request #90 from ApproxFun/feat-rename-spaces

Feat rename spaces