Update README.md

Added detailed instructions for submodule setup
Update GUI and stats for nightly

Removed non-essenital stats and stat widgets, added new game modes
Make items readable again (no writing yet)
GUI tweaks
Support for writing items
Remove stats, GUI changes

- Removed energy regen and max health
- Changed tech handling (still broken)
- Dialog size tweaks
- Fixed blueprints
- Updated crash dialog
Playing with mainwindow layout
Tweak pixels spinbox
Update README.md

Update submodule instructions
Techs now working
Essentials bar now working
Update screenie
Update README.md

Added version->download table