New Doc file for 152 media 3.0 (#1037)
New Doc file for 152 media 3.0 (#1037)

* new doc file

* adding truncated targeting keys

sonobi/prebid.github.io,sonobi/prebid.github.io,sonobi/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io