Various documentation improvements (this is an evolving list): ##### CookBook * [ ] Write MPI and parallel processing * [X] Mention existing remote modules and add link to the list ##### Examples * [ ] Finish reviewing examples after migration to sphinx #1865 ##### Tutorials * [ ] Rewrite Segmentation exercises to use all in one app for LSMS, change images... * [ ] Add a 30 minutes introduction with illustrations about SAR images (find Creative Commons support look at SAREDU project for instance https://saredu.dlr.de/) ##### Build system * [ ] Remove examples tests? * [ ] Remove examples tests baselines? * [ ] Add RunExamples.py script in a new test * [ ] Fix missing example usages * [ ] Improve license header filtering in rst render (itk copyright) * [ ] Handle `ApplicationExample` * [ ] Move `Documentation/Cookbook/Art/` to Data/ after the LFS migration is complete (!387)