add geomtry contrators
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/wscript
rename cust_func to wip (work in progress)
Add test Array3D files
Add contractor on voxel grid
Add class IntInterval
fix compilation issues
Fix Array3D initialisation
add CtcVoxelGrid test and contraction
Add Integral Image computation tests in test_Array3D.cpp
fix tests contraction with only one pixel
remove debug output
add CtcImage2D
remove unused projects
Add CtcNDArray project
Upadate CtcImage and CtcVoxelGrid doxygen comments
update doc
Add check when the inital box contains all real
Change test with only one pixel
Merge remote-tracking branch 'upstram/develop' into CtcImage_dev