Removed lots of warning introduced with my last commit, cleaned up a bit duplicateBoundaries, and introduced support for 2D for DuplicateBoundaries.

More cleanup is going to follow soon, especially in the modified part of commandline.

(2) Make pyramid's points and monomials ready for differenciation of subdivision-ready and optimization-ready basis
(3) Correction number lagragian bezier coeff for pyramids p1

Addition of plugin DuplicateBoundary that allow one to modelize inter granular cracks with cohesive zones. 
Addition of the line command ComputeBestSeeds that allow one to optimize the placement of seeds in a microstructure to remove small edges from the Voronoï representation.
Small additions to cross3D and direction3D to compute the smoothness fo fields.

up and fix Scal2Vec and Scal2Tens --- Scal2Vec is finally not deprecated (that makes sense to keep it) --- Sorry for multi-commits

new plugin Scal2Tens (evolution of Scal2Vec) --- Scal2Vec in deprecated (no longer available in the GUI - available for scripts)

new plugin Scal2Tens (evolution of Scal2Vec) --- Scal2Vec in deprecated (no longer available in the GUI - available for scripts)

coherence now removes degenerate entities (curves, surfaces & volumes). Not toroughly tested !!!