Updates README with versioning information, and notes about the version 4.0.0 update.
Updates README with versioning information, and notes about the version 4.0.0 update.

Lotame/LotameDMP-IOS,chenr2/LotameDMP-IOS,chenr2/LotameDMP-IOS,Lotame/LotameDMP-IOS,chenr2/LotameDMP-IOS,Lotame/LotameDMP-IOS,chenr2/LotameDMP-IOS