deleteToURL:completion: immediatly deletes the object and restores it in case of an API failure.
Release 1.6.1.
Fixing 64 bit crash.
Release 1.6.2.
Potential crash fixes.
Release 1.6.3.
Release 1.6.3.
Allowing nil substitution values in production.
Release 1.6.4.
Whitespace.
Possible edge cases.
Release 1.6.5.