v5.3.0
* 5c60290 add description to README.md * 6891c98 add method GetAvailableClientRolesByUserID * b21e401 add Required field to RoleDefinition
* 5c60290 add description to README.md * 6891c98 add method GetAvailableClientRolesByUserID * b21e401 add Required field to RoleDefinition