Dining hall open/close messages, visual edits

CSS:
- increased font size of top text
- formatted the links to make it more clear that they are links

HTML:
- minor english changes

JS:
- replaced static dining hall panels with dynamic ones that draw
information from array data
- added links for Menu and dining hall schedule
- still need to fix date bug (should be 11th not 11st, 13th not 13rd)