[Neo] IMDB search stuff

[Anders Nawroth]

Hi!

I moved out the "search engine" in the IMDB app to its own class 
(ImdbSearchEngineImpl). The ImdbServiceImpl class now only uses simple 
indexing and calls ImdbSearchEngineImpl for the more complex things.

Design question: should the search engine be more like the index 
service, returning raw nodes, or should it wrap them as Actor/Movie 
objects (would be more consistent in itself this way I think). Which 
alternative would create the least confusion for the newcomer?

It's just a detail, but for an example app details matter a lot!

WDYT?

Code at:
<https://trac.neo4j.org/browser/laboratory/users/andersn/imdb-app/src/main/java/org/neo4j/apps/imdb/domain/ImdbSearchEngineImpl.java>
<https://trac.neo4j.org/browser/laboratory/users/andersn/imdb-app/src/main/java/org/neo4j/apps/imdb/domain/ImdbServiceImpl.java>

Attached class diagram.

/anders

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