added amazon quantities calculator skeleton
added db scheme
added basic quantity processing
added processing of old quantity
added display of old quantity
changed ApiAmazon getConfig to output single values if single values are requested
use dynamic value J as daysback and not hardcoded 30 days
refactored getQeury to be able to reuse it for querys from a certain timestamp
added calculation of post change date quantities
implemented visualization of post change date quantites
improved display
Merge branch 'feature/AddQuantitiesBeforeChange' into develop