Define size mappings for ad units
Upgrade jQuery DFP
Use a ruby block in ad components, remove ad unit size filter
Adjust size mappings, include background ad size map, remove 'sponsored' text from leaderboards
Cleanup leaderboard styles, align vertically
Test ad component properties are defined, deprecate custom ID
Move ad size mappings into separate config
Deprecate layout leaderboard targeting, JSON encode ad component targeting properties
Drop ad unit IDs, let DFP generate them
Update ad unit docs
Add position information to leaderboards in layout
Merge pull request #669 from lonelyplanet/matth/ads-size-mapping

Ad unit size mapping