Irbasis

Introduced version string irbasis.__version__

* Minor bug fix (irbasis.sampling_points_matsubara was not exposed)

Reverted unintended changes in the Python library (sparse sampling)

Improved performance of compute_unl by using a new algorithm.

Major updates from v1.x.

* ulx(), vly() support broadcasting.
* Numerical precision of data computed by compute_unl() has been improved.
* Generation of sparse sampling points has been implemented in the Python library.
* Internal data structure has been changed from piecewise polynomials to piecewise Legendre polynomials.

The version 1 has been released with a minor bug fix.