Merge pull request #2 from open-cv/fix-issue-1

Fix issue #1 .

removed pcl-1.x dependency from pcl2-core component

Added missing copyright notice to numerous files

Added support for creating/caching a spatial index when calling findFixedRadiusNeighbors function; refactored core matrix code to replace some includes with forward declarations

more work on the search classes

bug fix

nm

Added new constructor in Cloud; started working on search

More changes than I can list here. Added a bunch of matrix operations and functions. Added some more examples. Removed any uses of ConstMats, since we may be removing those classes

added new draft

removed the draft

Indexed kernels

kernel test

kernels static, building on SSE