Remove not used variables...
Adding the possibility to add a single 2D image view
Adding image orientation
Dealing with the add of displaying n images
Add the possibility to update image position and content
Cleaning old comments
Merge branch 'master' of github.com:kerautret/DGtal
Merge pull request #2 from kerautret/editsDivMesh

Edits div mesh
resolving conflict...
moving roundToUpperPowerOfTwo in inline header file
 updating change log
some corrections...
some adjust...
Adding display for ImageContainerBySTLMap and ImageContainerBySTLVector in 2D
adding new Object UpdateImage of DrawWithDisplay3DModifier to avoid to use internal Display3D images
renaming image modifier and some cleaning
some cleaning
adding normal update and front/back face rendering
small correction
debug y axis display