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: headers inclusion when on APPLE and OpenGL and GLUT are frameworks
Fix: remove find_package(OpenGL) and find_package(GLUT) calls

Now calls to find_package(OpenGL) and find_package(GLUT) are done in
pcl_find_gl.cmake
Fix: In had scanner is always building

cmake is case sensitive, the build variable didn't get set.
Merge pull request #360 from mdkus/master

small bugfix for init of thread number
Matrix representation just needed for umeyama

Conversion of point cloud to a matrix is done allways, but it is just needed
if use_umeyama_ is set.
Merge pull request #366 from hdiethelm/est_svd_fix

Matrix representation just needed for umeyama
Add ability to load a PCLPointCloud2 from OBJ file
Merge pull request #368 from nizar-sallem/obj_support

Add ability to load a PCLPointCloud2 from OBJ file
Merge pull request #365 from fran6co/patch-2

Fix: In had scanner is always building
Merge pull request #364 from nizar-sallem/fix_gl_stuff

Fix gl stuff
Merge pull request #358 from arbeitor/master

Added a function to LINEMOD that is able to read templates from several files.
Small features: more comfortable thread handling
Merge pull request #370 from mdkus/master

Small features: more comfortable thread handling