* ClouDNS: first version of provider
* ClouDNS: documentation
* ClouDNS: code cleanup
* ClouDNS: GetNameservers now uses ClouDNS API to fetch NS servers list
* ClouDNS: CAA support
* ClouDNS: TLSA support
* ClouDNS: tests credentials now use variables instead of hardcoded values
* ClouDNS: SSHFP support
* ClouDNS: export only necessary methods
