Allow warnings to be turned off for photons that have more than a certain number of interactions.
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
Make options for warning control backward-compatible in Fortran code
Make options for warning control backward-compatible in Python code
Merge pull request #61 from astrofrog/allow-no-stokes-images

Implement a way to disable Stokes components in images
Refactor how monochromatic option is set on images so as to avoid issues when reading/writing models
Fix issue that occurred when the monochromatic mode was set before adding images.
Merge pull request #78 from astrofrog/refactor-monochromatic-io

Refactor how monochromatic option is set on images so as to avoid issues when reading/writing models
Merge pull request #68 from astrofrog/add-warning-control-max-inter

Allow warnings to be turned off for photons that have more than a certain number of interactions.
Added missing 'save' statements
Fixed whitespace
Fixed string type checking
Added workaround for HDF5 installation for gfortran 4.5 and earlier versions.