[KFSQA-649] Refactored AccountingLinesMixin et al. to move out rarely used fields into their own mixins.
[KFSQA-649] Got Transfer of Funds working and fixed some visit() bugs in existing FP objects.
[KFSQA-649] Got Distribution Of Income And Expense working.
[KFSQA-649] Cleaned up AccountingLine.
Merge branch 'master' into KFSQA-648

Conflicts:
	lib/kuality-kfs/data_objects/financial_processing/accounting_line_object.rb