Update README with pointers for TabLayout

[pallgeuer]

Atop the README it says:

This library is not maintained anymore and there will be no further releases. For most of the cases you can use TabLayout instead of this library.

After a significant amount of searching through the internet it is still not clear to me how TabLayout can successfully be used to implement a tab strip where the selected tab stays in the center. Thus, a quick link below this statement, or a brief suggestion of what methods/attributes to look into for TabLayout would be very useful.

[jvlppm]

This answer helped me with a similar effect:
https://stackoverflow.com/a/39869405