added SKU helper functions
use SKU helpers
added DailyNeeds db scheme
added getConfig method instead of hardcoded constants
streamlined CalculateHistogram class
fixed undefined constants errors
added method processArticle
dded storing of results in db
changed from fixed test time to real time
Merge branch 'feature/GetHistogramData' into develop

Conflicts:
	config/example_db/netXpress.sql
	experiments/CalculateHistogram/CalculateHistogram.class.php