Several changes to the nexage connector...

+ Added creative configuration
+ move 'iurl' from campaign level to creative level
+ Added 'cat' and 'attr' in creative info
+ Make creative compatibility use the NexageCreativeConfiguration
+ In seatbid the bid.adm is now expanded by the NexageCreativeConfiguration.
+ Added bidRequestCreativeFilter to filter by blocked categories, blocked
adomains and blocked attributes
Merge pull request #180 from Motrixi/nexage-exchange

Changes to the nexage connector...