fix style location bug
style mod
add favicon
add CC BY-SA 4.0 licnse logo
add footer style
change to footer tag
style mod
body margin&padding
style mod
footer display block
html bg color
Revert "html bg color"

This reverts commit 2dc8cfe3c4e26e2032d6b656376a46e41dd05f10.
footer extend to rest of page
extend fail so use line instead
body percentage
center
fix margin
fix padding
some style mod
some mod for style