What's Changed
* Minor by mattias-ek in https://github.com/mattias-ek/isopy/pull/49
* Minor by mattias-ek in https://github.com/mattias-ek/isopy/pull/50
* Added keyfmt to IO write functions by mattias-ek in https://github.com/mattias-ek/isopy/pull/51
* Added keyfmt to to_<file> functions by mattias-ek in https://github.com/mattias-ek/isopy/pull/52
* Minor commit by mattias-ek in https://github.com/mattias-ek/isopy/pull/54
**Full Changelog**: https://github.com/mattias-ek/isopy/compare/v0.7.3...v0.7.8