allow to add search result count widgets from no results pages. fixes #496
make api client timeouts configurable

the application will log timeout keys that are available on debug (on their first use)
each timeout can be configured in the graylog2-web-interface.conf with setting:
timeout.<keyname> = 5ms (e.g.)

time parsing is done via typesafe's configuration object (e.g. 1s, 5m etc)

fixes #592
fix timeout config w/respect to tests and injection

fixes #592
Merge git://github.com/Graylog2/graylog2-web-interface into develop