Add RaspiOS and 64 bits support, go1.17

Full Changelog: v1.0.1...v1.1.0

First official release

It's been working great for two years now and now making this official: v1.0.0.

Include these recent fixes:

• Includes go.mod
• efe: Automatic SDCard path detection
• efe: Automatically fetches last Raspbian Lite image and flashes it
• push: works on macOS' rsync version