- removes the parameter for newVersionCheck as was not being used
- changes newUpdatesCache to take expiry parameter for possible future
configuration option
- adds basic test quite to verify all cache fucntions work as expected
includes cache of latest version and page to view if updates are
available with a link to the latest update's release notes and a link to
check for the latest update now, refreshing the cache manually.
Matt Baer
Rob Loranger