Container and view refactoring

Here is the work in progress about the view and the container refactoring. This PR integrates PR#136, #129 and #100.
You should be able to manipulate itk and mesh images for now (3D and 4D). 
You will need to recompile VTK to  use openGL support.

Private plugins have now been updated. Look for refactor-update branches on asclepios and visages superprojects and plugin repos.

TO DO List (do not hesitate to add items to the list):
- [ ] load and double-click in browser area
- [ ] thumbnails in browser area
- [x] interactors pool (change user interface)
- [ ] review medAbstractWorkspace to simplify (toolboxes creation, ...)
- [x] rubber band zoom
- [ ] open folders (e.g dicom folders) from container's shortcut
- [x] a way to modify mouse interaction with the view