v3.0.0-rc2

Changes since v3.0.0-rc1:

• warn instead of fail when devkit modules have untracked files during a devkit install
• add a mobile UI (visit http://[your-ip]:9200/ on your device, swipe up with two fingers in a game to activate)

Bug fixes:

• devkit console logging cleanup
• fix devkit install [url]
• fix devkit modules --list-versions
• fix simulator screenshots