added if statement to "availability".

fixed CSS to adjust image size

Update README.md

added "event" files

Delete settings.json

Delete demo.html

fix img to fit into width of menu-item

fixed opacity changes according to hover

fix link function

add files

Update README.md

add category functionality.

fix menu files

add new links

add new files

Update README.md

add demo file

add new files

Update menu.html

Update README.md

Update README.md

Update README.md

Update README.md

add file

system/README.md added