Improving Integral invariant (both 2d/3d).
include missing.
minor fix
Merge branch 'MongePrincipalCurvature' into IntegralInvariant
Merge branch 'MongePrincipalCurvature' into IntegralInvariant
Merge branch 'MongePrincipalCurvature' into IntegralInvariant
adding operators for CurvatureInformations
resolving bug with Viewer3D
changelog
Merge branch 'master' into IntegralInvariant
removing warning
with asserts working for Integral Invariant
minor edit
some minor modifications
Adding a Number reader in io/reader
adding missing file for example doc
Merge pull request #762 from kerautret/addMissingFile

adding missing file for example doc
Missing include
Merge branch 'master' of github.com:DGtal-team/DGtal into masterDGTal
renaming and update tests