Add `TintDesignable` in readme
Add `TintDesignable` in readme

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