Added some docs
[+FEATURE] Complete refactoring of debit order export with possibility to add more export types easily.
[~TASK] Add breadcrumbs + title to debit order view in the backend
[~TASK] Added IBAN/BIC fields to the system config
[~TASK] Fixed coding standard violations
[~TASK] Fixed phpmd violations
[+FEATURE] Added custom validation model / Added new config setting 'Minimum Order Amount' / Fixed translation
[~TASK] Added version to doc comments
[~BUGFIX] Mask bank data only in debit type 'bank'
Merge branch 'feature/optimisatiom' into develop