A few more convenience functions

• A few convenience functions to create NmtBin objects.
• Slight speed-up to covariance calculation through OpenMP
• Workspaces are now stored as FITS files.
• Different lmax parameters for SHTs, MCMs and binning.

Post acceptance + bells + whistles

v1.0 changes

• Paper accepted
• Support for rectangular pixelizations (CAR pixelization with Clenshaw-Curtis separation).
• Support for spin-0 and spin-2 covariance matrices.
• Convenience functions to recover bandpower windows and the unbinned mode-coupling matrix.
• Arbitrary ell-weighting (e.g. can compute D_l = l*(l+1)*C_l/2pi).
• Simultaneous calculation of the MCM for all spin-0 and spin-2 combinations.

Pre-acceptance version

This release contains the code after the validation procedure that led to the article submitted to the arXiv.
A v1.0 version will be released after the paper has been accepted by the journal.