Action needed to release the 0.2.0 version

• [x] https://gitroot.dev/gitroot-0.1.0 is linked in zero to hero and deploy instance tutos
• [x] path will move from https://gitroot.dev/gitroot-0.1.0 to https://gitroot.dev/releases/...
• [x] delete next release until automatic build (not reallist today)
• [x] compile and scp gitroot and plugins
• [x] update gitroot itself
• [x] update plugins (in git)
• [x] need to clean silo cache (between gitroot relaunch)
• [x] update from zero to hero with direct download and checksum