AMPforWP - Advanced AMP ADS 1.19.29

* Feature Added: =
* Added an option to place Ad after every nth paragraph in the Incontent ADS.

* Bug Fixed: =
* Resolved the issue of space above standard ad.

* Bugs Fixed: =
* Resolved the issue of ad loading inside other tag when using percentage condition.
* Resolved the issue of not able to add license key when using AMP by AMP Project Contributors.
* Resolved the validation error with Quotation mark (') in Targeting Ads for Author info(Sticky Ads).