Merge branch 'release/v0.2.0' into develop
Add comments to pairing section
Fix comments
Add initial files for keypad and trackpad demos
Update mobile main page styles
Fix text
Update PC main page styles
Add 'Return to main page' link and corresponding socket.io logic
Merge branch 'feature/demo-list' into develop
Comment out socket.disconnect() when invalid code is submitted; makes it easier to try again without reloading page
Add cleanup code on socket disconnect
Update version number to v0.2.1
Merge branch 'release/v0.2.1'