Removed check for source normals, since only the target cloud is required to have normals.
Fixed MSVC linker crash.

* Linking pcl_features hit 4GB memory limit in release mode. Disabled whole program optimization and link-time code generation as a workaround.
Corrected initial traversal index

Initial index was wrong when multiple viewports are active.
Add: support IFS file format
Merge pull request #345 from jakobwilm/transformation_estimation_fix

Removed check for source normals
Merge pull request #350 from kwaegel/msvc_linker_fix

Fixed MSVC linker crash.
Merge pull request #354 from nizar-sallem/ifs_support

Add: support IFS file format
Add: load pcl::PolygonMesh from IFS files
Fix: documentation
Update: simplify the API and the code

No deprecated inhere since the methods are private and only used
internally.
Update: clean up around range_grid
Add: ability to load a PolygonMesh from PLY files
Fix: documentation
Merge pull request #356 from nizar-sallem/ifs_support

Add: load pcl::PolygonMesh from IFS files
const correctness fixes
Added i increment.
Fix opengl headers for Mac osX
Added a function to LINEMOD that is able to read templates
from several files. Useful for object recognition systems
that store templates for different objects in different files.
small bugfix for init of thread number
fix: libc++ is more picky when it comes to const methods