dust_extinction: Interstellar Dust Extinction Models

What's Changed

• Logo by @karllark in https://github.com/karllark/dust_extinction/pull/254
• Add utility to save G23 model to ascii files by @karllark in https://github.com/karllark/dust_extinction/pull/259
• Updated optical-NIR anchor wavelengths for G24 SMC models by @RanitBehera in https://github.com/karllark/dust_extinction/pull/261
• Add KP5 as a grain model by @keflavich in https://github.com/karllark/dust_extinction/pull/258
• upating G25 -> G26 by @karllark in https://github.com/karllark/dust_extinction/pull/263
• Fix the P92 test error by @karllark in https://github.com/karllark/dust_extinction/pull/266
• Add documentation on curve normalization by @karllark in https://github.com/karllark/dust_extinction/pull/265

New Contributors

• @RanitBehera made their first contribution in https://github.com/karllark/dust_extinction/pull/261

Full Changelog: https://github.com/karllark/dust_extinction/compare/v1.6...v1.7