Matel

Results 2 issues of Matel

I've downloaded the example and did some tests. But when tried the action Delete at Presence Example I got the error: ``` [error] GenServer #PID terminating ** (Ecto.Query.CastError) deps/ecto/lib/ecto/repo/queryable.ex:411: value...

Starting from amqp-3.0, `:lager` will no longer be required then removes `:lager` configuration. If still use amqp 1.x/2.x already had `:lager` in them applications configs then it's fine to remove...