Fix some memory issues
Revert createBanner/removeBanner to createAdView/removeAdView
Remove implementing ITapForTapAdView

A private member variable is used as the implementation of the interface.
Add new initialization method that allows setting the mode.
Add three new App Wall/Interstitial events

- OnReceive
- OnShow
- OnTap
Update listeners with new events
Remove debug API key
Slow down how fast ads cycle.
Remove API key from test javascript test script
Add test scene
Update solutions
Update pidb files
Ignore Assets/AssetStore*
Fix replacing version number
Add the Readme