renamming
Add image extractor functor 3D -> 3D from ref points
merging with the master, solving small conflicts
renaming in ***DSSIterator.cpp
renaming in testDSLSubsegment
clean assert
Board3DTo2d + Viewer3D
merge and solve conflicts
Revert "clean assert"

This reverts commit 11fdfb5dccf91aca3d65a3c63cd0bebd5726acf7.
rewrote assert verify is now fatal_error
renamed verify to fatal_error
doc
added TCompare template param.

TCompare apply to the compare template param of std::set.
another merge
tmp..
Merge branch 'master' of github.com:DGtal-team/DGtal into 2DImageExtractor
completing doc for functor Point2DEmbedderIn3D
Merge pull request #660 from troussil/Primitives

Primitives in geometry/curves
 using directIncident with innerPoint and indirectIncident with outerPoint functors (see #671)
 doc changes