Added centerOffset paramter for map annotations
[TIMOB-9332] Address Comments
[TIMOB-9332] Update Docs
[TIDOC-1189] Overhaul DocViewer documentation
[TIMOB-9332] Doc Update
Merge pull request #4433 from vishalduggal/timob-9332

[TIMOB-9332] IOS: Add support for centerOffset on AnnotationProxy
Merge pull request #4434 from bhatfield/tidoc-1189

[TIDOC-1189] Overhaul DocViewer documentation