Switch images to full allocatable real(dp) arrays instead of stokes_dp arrays so as to be able to change the number of stokes parameters being kept.
Modify Fortran code to support option to enable/disable stokes vector in images
Add option in Python code to only store I component of images/SEDs
Raise proper exception if stokes component other than I is requested but was not computed
Bug fix in Fortran code
Added documentation for ``set_stokes``
Change default for Stokes saving to False
Added entry to changelog
Merge pull request #61 from astrofrog/allow-no-stokes-images

Implement a way to disable Stokes components in images