Support decay factor in MeritFacade::StorageAdapter
Support decay factor in MeritFacade::StorageAdapter

The decay attribute is now treated as a factor... 0.5 means 50% of the
energy stored will decay each hour. 0.0 means no energy decays, while
1.0 means all energy will decay and be unusable.

quintel/etengine,quintel/etengine,quintel/etengine,quintel/etengine