this const was missing I guess
Added includes for completeness.
Merge commit 'refs/merge-requests/76' of git://dev-med.inria.fr/medinria/medinria-plugins into integrate76

Removed deprecated warning on a limit to 2 Meshes

Conflicts:
	v3dView/v3dView.cpp
reset the views camera after a new mesh is added so all meshes are visible even if the fisrt or last added was to small
gray level mouse interaction per layer.
Fixes medInria bug #55: windowLevel interactions on layers
Fixed mem leak / double Delete
Factorises layer knowledge for 3d and 2d a bit.
WIP refactoring vtkimageView to include layers in base class
Uses a different icon for maximising and unmaximising views
Window Level works in 2d and 3d. Work needed for MPR and scalar bar
Fixes scalar bar per layer.
Added a WindowLevel for the planar rendering, in sync with layer 0
Add spin box for easier setting of brush radius. Fixes #301
Fix compilation errors.

vtkGetObjectMacro does not seem to work with SmartPointer members. Using
it results in compiler errors relating to operator<<.
Added PhilipsRecDataImageReader
Added PhilipsRecDataImagWriter
Set the current layer in v3dView
Synchronises W/L when goign from 2d->3d for all layers

Note: at the moment of this commit vtkinria3d will only apply it for layer 0, but the medinria-plugins part is in place.
Changed a few qDebug statements