Octomap-py

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- Fix octovis includes for QGLViewer > 2.5

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- Fix for raycasting termination condition in computeRayKeys() (affects
insertScan / insertRay). Thanks to C. Sprunk!

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- New function setNodeValue(...) to directly set a node's value (31)
- New approximate point cloud insertion as fast variant (39, see flag for
insertPointCloud(...) / new function computeDiscreteUpdate(...)

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- Improved OSX 10.9 compatibility (thx to B. Jensen)
- Improved VC++ compatibility (thx to tmdiv)
- New fct. getRayIntersection to get real intersection of raycasting on
voxel (thanks to F-M. de Rainville)
- Fix 54: Quote paths in CMake configs to avoid problems with spaces
- Fix 53: Auto-pruning after updateNode
- Fix 44: CMAKE_SHARED_LIBRARY_SUFFIX in CMakeConfig (Win / Mac compatibility)
- octovis now includes QGLViewer 2.4 (Qt5 support)
- octovis now looks for the octomap version of the same number

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- New function swapContent to exchange the contents of two octrees (issue 32)
- New normal estimation based on marching cubes (thanks to F-M. de Rainville)
- Fixed octovis edit box affecting small selection ranges
- Fixed compilation with gcc 4.8 and OSX (issues 23 28)

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- Speedup: Pruning is now done only on affected nodes on each call to
updateNode(). You no longer have to call prune(), except when you manually
change nodes or use lazy_update.
- insertScan() renamed to insertPointCloud(), removed parameter "pruning"
- insertScanNaive() renamed to insertScanRays(), removed parameter "pruning"
- insertScan() / insertPointCloud() / insertScanRays() can now be parallelized
with OpenMP, currently disabled by default. Enable with CMake flag OCTOMAP_OMP
- Empty octrees no longer contain a root node (11)
- Library names in CMake configs are now absolute paths, you should no longer
use OCTOMAP_LIBRARY_DIRS with FIND_PACKAGE (14)
- graph2tree: pointcloud is transformed in batch before insertion, small changes
in command line options
- octovis: more map editing options, fixed setting nodes to free/occupied (thx
to C. Dornhege)
- Sample data is now in octomap/share