Merge pull request #12 from DM13B/master

Merge master into gruppe2alex
add SuggestionAlgorithm

fix accessibility level for basic model classes
refactor DecisionBase to use SuggestionAlgorithm
add docstring for CalculateProduction
Merge pull request #14 from DM13B/Gruppe1RefactorDecisionBase

Gruppe1 refactor decision base
Merge pull request #15 from DM13B/master

mergine master into gruppe2alexbranch
products dataaccess + small ui for products (non functional yet)
Merge pull request #16 from DM13B/Gruppe2Alexander

Small products UI and Products dataaccess
Update