KageroCalc 2.4 - UI Update, New Heroes, Bugfixes

Puts in new Lyn... The new bows are hell. (#101)

* Puts in new Lyn... The new bows are hell.

* Fix Laws of Sacae's effect and improve bonds message

KageroCalc v2.3 - Community Testing App Update

Repo now has a testing app and instructions.

KageroCalc v2.2 - Yukari and Lorenzooone bugfix release

Lots of bug fixes and tweaks from @YukariTea and @Lorenzooone. I also rewrote the first damage reduction logic and fixed a few issues with @Lorenzooone's additions.

Thanks for your help people, this is awesome!

KageroCalc v2.1 - Before Lorenzooone

Tagging this so we can jump back to it if necessary. Lorenzooone just added a bunch of bugfixes and additions, and I don't have time to test today.