Change styles

This commit changes the priority of Chinese fonts in styles.css.
add page footer
Merge branch 'dev' of https://github.com/m13253/sawroeg into dev
add COPYING.html
add CREDITS
Format CREDITS
Styles adjustment
Modify CREDITS
Styles adjustment
change words
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.