Merge pull request #177 from datacratic/upstream_22_04_2014

Added documentation for filters
Merge pull request #178 from datacratic/upstream_28_04_2014

Upstream 28 04 2014
Merge commit '8b37b51d33960a120fdb463865cad8b1e9624e78'
fixed minor issues in the standard ad server
Merge pull request #179 from datacratic/upstream_05_05_2014

Upstream 05 05 2014
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...
Fix: nexage test -> add iurl at creative level (not campaign level)
Merge pull request #182 from Motrixi/nexage_test_fix

Fix: nexage test -> add iurl at creative level (not campaign level)
Merge branch 'upstream_12_05_2014' of https://github.com/datacratic/rtbkit into datacratic-upstream_12_05_2014
Merge branch 'datacratic-upstream_12_05_2014'
Merge pull request #24 from rtbkit/master

Downstream 15_05_2014