WebSearch: smarter journal hint

* Improves the JournalHintService implementation by directly
  a brief representation of a record when one is found.

* Additionally, suggests to use find rawref "foo" when "foo"
  is searched for, rather than journal:"bar".

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Merge pull request #99 from kaplun/smarter-journal-hint

WebSearch: smarter journal hint