read created extractor id from response

 we should highlight the newly created extractor on the following page, too
pass api client instance in as parameter
move all() and create() methods to userservice

remove static references to ApiClient
remove static reference
permissions is now a service, uses non-static api client
also pass api instance to local user
make nodeservice responsible for loading log levels

this avoids creating yet another service, and since this is tied to a node anyway it's fitting.
could possibly also go into Node itself
do what i said in the last commit ;)

move allLoggers to Node, we already do that for other things
de-staticize remaining ApiClient.get calls

moved lots of stuff to ClusterService, we need to reorganize some of this later.
completely removed static methods on ApiClient
Merge git://github.com/Graylog2/graylog2-web-interface into develop