NewDate property will only be set if
remote configuration file (retrieved using Check method)
contained creation Date information for specified
file. When this property is filled, wodAppUpdate can be set
(through ReplaceRule
property) to verify local/remote date information and
replace files only if newer.
This is very convenient when files
don't contain version information, so different rules
must be used for making decisions whether files are
up-to-date or not.