Librato::Client#metrics can't paginate, filter by tag or compose queries

[hakanensari]

I came across this when wanting to build a composite query. Librato::Client#metrics currently doesn't allow to apply tags or compose. Pagination seems to be broken as well.

Also, the examples in the source code reference the deprecated method.

[nextmat]

Thanks for the report. I've fixed the doc errors, it looks like when we refactored some of those methods for the name change we lost the ability to do passthrough for other api options. We'll restore that.

[nextmat]

Oh, regarding pagination we don't auto-paginate any measurement fetches in the gem. We've discussed adding it in the past, implementing it in client code is pretty simple though.

Ultimately I'd like get_measurements to return a lazy-loading enumerator that does smart pagination as needed behind the scenes. We don't have that yet however.

[nextmat]

Added get_composite in 1.5.0 to make fetching composite measurements easier (example at the bottom of this section in the README).

Follow #84 if you are interested in updates as we address auto-pagination.