Bugfix:
-If Data from Table productiondata for previous-year-values is not fully filled with values, 0.0 will be added instead of nothing
-Planning_data values refer to previous year now instead of same year
-Insertion of any characters is possible withot throwing exceptions -> value will be ignored
Merge branch 'develop' of https://github.com/Jather90/AMOS_proj5 into develop