Partial commit towards promotions view's final solution.
Loading promotions only once (per fragment creation).
Fixed a big context leak in promotions view.
No need of promotion default drawable (1MB less).
Coding the adaptive downscaling of promotion images.
Merge branch 'master' into grid-memory
Fixed issue with double promotions grid view in memory.
Updated picasso to 2.0.1-SNAPSHOT.
Picasso trick to allow bitmap recycling.