refactoring FMM helpers (they become point functors)
renaming + adding updated min and max values, which may be useful
working on initialisation from bels (possibly at the zero level set of a function, but this is not tested yet)
Writing concept CCellularGridSpaceND (v4).
continue, but assert on example
bug fixed; but not totally satisfactory
Merge pull request #318 from dcoeurjo/RemovingTools

Removing tools from DGtal repo
new initialisation from an existing implicit function finished
second-order acurrate Euclidean DT
Writing concept CCellularGridSpaceND (last version). Update TopologyPackage doc.
Merge branch 'master' of github.com:DGtal-team/DGtal
adding 3d example with QGL visu
Merge pull request #319 from JacquesOlivierLachaud/KSpaceConcept

K space concept - close issue #288
 adding tests on the accuracy of the computed distance values + changing examples
example with speed extrapolation out of the interface
Add copy constructors and assignment to fractions. Add std::types (reference, pointer) to fractions so as to be used as containers.
Modify std::types so that clang++ compiles. clang++ is faster both for compiling and at execution than g++ on macbookpro/macosx.
Remove INLINE and BUILD_INLINE. they are no more supported.
Remove BUILD_INLINE in .cpp files.
Merge pull request #322 from JacquesOlivierLachaud/RemoveINLINE

Remove inline