New backend() method in view API to access underlying implementation
adds a vtkImageView3d as a variable of the medVtkViewBackend, corrects an error in implementation

Conflicts:
	src-plugins/variationalSegmentation/varSegToolBox.cpp
Fix a crash on selecting the Jet LUT
Fix mesh exporters
removes 2 useless memory allocation
adds the vtkRenderWindow to the backend
Merge pull request #121 from fvichot/jet-lut-crash

Jet lut crash and mesh exporters fixes
Merge pull request #124 from Hakim-F/memoryImprovements

Memory improvements
Merge pull request #102 from rdebroiz/0000-new_qss

new qss
Merge pull request #118 from fvichot/new-view-backend-api

New backend() method in view API to access underlying implementation
solves windows error added by the new qss
start refactoring cmake stuff (src + src-plugins/libs) and moove src/plugins/libs to src.
add vtkItkWrap module to vtkInria (it just embed some .h/.txx)
moove back plugins in src-plugins
moove medPluginGnerator in app
refactor the CMakeLists of the app
moove ressources stuff in app/medInria/ressources
fix QSingleApplication dependent code, add medPacs include dirs to medInria include dirs
fix typo rcc -> qrc
remoov debug message