unit tests for OrganizationController edited to cover error #96
fixed error caused by missing persistenceManager, closes #96
copyright notice adapted, closing php tags removed, code formatting, closes #83
attribute positionRepository moved to parent class, test for attribute added
tests for OrganizationController::deleteAction edited and added to cover #98
prevent unauthorized FE users from deleting organizations, closes #98
error message for OrganizationController added
unit tests for OrganizationController::deleteAction added and edited. Covers issue #97
prevent organization from being deleted if it is referenced by any position. Closes #97
Merge pull request #100 from dwenzel/feature/preventDeleteOrganization

Feature/prevent delete organization
Merge pull request #101 from dwenzel/dev

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