curvatureMCMS update
estimatorComparator passed
 refactoring and renamming into localEstimators
add options in order to choose the estimators
 adding BC
 renamming localEstimators into 2dLocalEstimators
Merge branch 'estimatorsUpdate' of git://github.com/troussil/DGtalTools into debugComp
merging from tristan and CMake correction