- Fix for ambiguity in BlockScan::Reduce() between generic reduction and 
  summation.  Summation entrypoints are now called ::Sum(), similar
  to the convention in BlockScan.
		    
- Small edits to mainpage documentation and download tracking

- Refactor test and docs outside of cub directory.  Take generated html
docs off gitignore.
Updated include paths for regression test refactoring
update
Added WarpReduce
Updates to example dispatch framework
Update
BlockReduce now uses WarpReduce
Merge branch 'master' of https://github.com/NVlabs/cub
Update example tune policy dispatch
Updating examples
Update models for policy-guided dispatch
Updated docs
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