functions and structs shown in symbol list, struct made a keyword
'cons' removed from constants, fixed highlights: '#t' and '#f', keywords inside identifiers (like 'remove-if'), close bracket near constants.
highlight for #/ literals, improved string highlight (#/" isn't string anymore)
Merge pull request #3 from CheatEx/master

Awesome - thanks for the pull request and improvements! :+1: :beers: :fireworks: