Updating changelog for v2.1.1
VTK thumbnails for Mac crash when doing several (VTK and system related crash), revert to no thumbnails for VTK on Mac
Merge pull request #78 from ocommowi/1745-vtk-thumbnails-mac

VTK thumbnails for Mac crash when doing several thumbnails
Update release notes for 2.1.1
Implement the virtual pure plugin() methode in ITKProcessExampleToolBox.
fix #1742, adds tooltips for each of the navigator items
Fix #1745 and #1406
Embed thumbnail generation in QVTKWidget to solve our crash problems
It seems that on linux, being on the main thread is mandatory to avoid crashes
Merge pull request #81 from ocommowi/1742-tooltips-nav-items

Tooltips for navigator items
Update vtkDataMesh4D with the same code
Merge pull request #82 from medInria/1745-generate-thumbnails-in-main-thread

Generate thumbnails in main thread, and remove popup
Merge pull request #79 from rdebroiz/1746-ProcessExamplePlugin_implements_plugin

Implement the virtual pure plugin() methode in ITKProcessExampleToolBox.
correction in vtkImageView3D::UpdateVolumeFunctions
Merge pull request #86 from gpasquie/1752-LutSwitch

1752-LutSwitch
Initial version of the cliSupport plugin. Compiles, runs, populates the GUI.
Various enhancements to the CLI support plugin.

removed hardcoded module path, now scans for modules. Added Run button,
progress bar.
Updated code to latest medInria API