WIP: update `How to install` in readme
WIP: update `How to install` in readme

IBAnimatable/IBAnimatable,alexiosdev/IBAnimatable,JakeLin/IBAnimatable,seanwoodward/IBAnimatable,alexiosdev/IBAnimatable,IBAnimatable/IBAnimatable,IBAnimatable/IBAnimatable,seanwoodward/IBAnimatable,JakeLin/IBAnimatable