[3] Remove unecessary files to prepare 7.0.0
- convert bmp to png
- remove zip and docx files
- remove old icons
- remove launch files
- remove old gmfgraph files
- remove usecases.md files
- remove gmfgen_nak
- remove old and outdated releng files
- remove unneeded gitignore files
Bug: #3 (closed) Signed-off-by: Quentin Le Menez quentin.lemenez@cea.fr
Edited by Vincent Lorenzo