Add ImageEditor
Edit VTK_MODULES List

Memory issue
Sliders bugs fixed, download the last ImageViewer commit
Reorganization of the source code, add overlay feature
Take Image as first argument
Create xml file, CLI works
Load overlay image with CLI
Update ImageViewer CLI merge commit SHA1
Fix the window's name, can take 0 or several arguments
Using ImageEditor with the last ImageViewer commit merged
Merge branch 'CLI-image-editor'

* CLI-image-editor:
  Using ImageEditor with the last ImageViewer commit merged
  Fix the window's name, can take 0 or several arguments
  Update ImageViewer CLI merge commit SHA1
  Load overlay image with CLI
  Create xml file, CLI works
  Take Image as first argument
  Reorganization of the source code, add overlay feature
  Sliders bugs fixed, download the last ImageViewer commit
  Edit VTK_MODULES List
  Add ImageEditor

Conflicts:
	CMake/Superbuild/ExternalProjectsConfig.cmake