Clarify position should start from 0 in Kobler bidder. (#3375)
Clarify position should start from 0 in Kobler bidder. (#3375)

* Documentation for Kobler bidder adapter.

* Added information on how to generate a sample bid.

* Removed reading currency from currency.adServerCurrency.

* Clarify position should start with 0 in Kobler bidder.
prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io