Add a missing period

This fixes commit 8e42069d3a1db5c6b42803e850ca9fb413067ee5
Reformat README
Improvement CSS layout
Layout adjustment for small size screens
Sort sawroeg-web-static/styles.css
Add <html lang="zha">
Styles adjustment
Some HTML fixes
Responsible layout adjustment
Change default font for <input>

This fixes Firefox.
Add <meta> viewport

This gives correct scale on mobile devices.
Implement XML and JSON API
Merge pull request #4 from m13253/dev

Improvements on web interface