astrofrog/sedfitter: v1.4

• Small astropy 4.0 compatibility refactor by @keflavich in https://github.com/astrofrog/sedfitter/pull/67
• Update package infrastructure and fix compatibility with latest astropy versions by @astrofrog in https://github.com/astrofrog/sedfitter/pull/79
• ndistances can't be a float in recent versions of numpy by @keflavich in https://github.com/astrofrog/sedfitter/pull/73
• Use memmap when reading in model grids by @keflavich in https://github.com/astrofrog/sedfitter/pull/78
• More infrastructure improvements by @astrofrog in https://github.com/astrofrog/sedfitter/pull/80

Full Changelog: https://github.com/astrofrog/sedfitter/compare/v1.3...v1.4