#120 created KundeRenderer
#120 moved BillingKundeRenderer to another package
#120 renamed BillingKundeRenderer
#120 changed the BillingKundeRenderer.AGR_PROPERTY_NAMES
#120 implemented the methods setCidsBean() and cidsBean2Row() in BillingKundeRenderer
#120 changed BillingKundeRenderer.main()
#120 changed BillingKundeRenderer.isCellEditable() and BillingKundeRenderer.getColumnClass()
#120 jalopy
#120 changed BillingKundeRenderer.setCidsBean()
#120 changed layout of BillingKundeRenderer and added binding
#120 initialize the Verwendungszweck checkboxes with the usages from the billing.json
#120 created inner class BillingKundeRenderer.QueryBuilder
#120 in BillingKundeRenderer.QueryBuilder changed the type of user to CidsBean and renamed the variable to userBean
#120 added QueryBuilder.appendDates()
#120 in QueryBuilder added ignore Geschaeftsbuchnummer and Projekt if they are empty strings
#120 set the values of QueryBuilder
#120 filter billings when changes in the gui happened
#120 filterBuchungen(), check if metaobjects is not null
#120 changed used column name + jalopy
#120 added logging of the query and clear table if no results were found