Deliver RUM monitoring script via logjam

[janwiemers]

We should deliver the client part of the logjam monitoring via, so we can configure it properly on the serverside and send it to the client.

One way could be send the script through the logjam agent to the asset pipeline, or provide a helper method to inline the script tag to avoid the roundtrip and make sure that the RUM script is the first script which is necessary for it to work properly with XMLHttpRequests.