Add Ditto, Aggregation utils, PICAI dataset utils
What's Changed
- Aggregation utils to main lib by @jewelltaylor in #110
- Picai example by @jewelltaylor in #101
- Implementing Ditto for paper experimentation by @emersodb in #111
- Increment release version by @jewelltaylor in #113
Full Changelog: v0.1.12...v0.1.13