Methods don't return Link information

[k80w]

From what I can tell, there is no way of getting the information returned from the Mastodon API's Link: header in methods such as GetTimelines, though this does appear to be used internally in the package's code when multiple requests are needed to get the requested lopt.Limit for these methods; however, this is inconvenient in applications where a developer may want to cache statuses themselves. This presumably affects all of the 19 methods in this package which take a *LimitParams as an argument.