Make StreamingRenderer use a faster, rendering oriented bbox operation 
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                 Key: GEOT-2735
                 URL: http://jira.codehaus.org/browse/GEOT-2735
             Project: GeoTools
          Issue Type: Improvement
    Affects Versions: 2.6-M2
            Reporter: Andrea Aime
            Assignee: Andrea Aime
             Fix For: 2.6-M2


StreamingRenderer adds a bbox to load only the features contained in the area 
to be painted.
However, this bbox is the standard one that will trigger topological 
operations, it's quite inefficient when it comes to reading files from the disk.
Have it use a custom, faster bbox operation as a stop gap measure until we find 
the time to formalize an official, api recognized, loose bbox one

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