Application should be reactive

[fernandohackbart]

Seems that I am not yet ready to fully implement reactive in the code

https://github.com/ReactiveX/RxKotlin

[fernandohackbart]

https://medium.freecodecamp.org/rxandroid-and-kotlin-part-1-f0382dc26ed8

[fernandohackbart]

https://github.com/ReactiveX/RxKotlin