Add parsing of operators and identifiers
Fix parsing of operators, add list parser
Fix list rule
Add esrap
Add list, array, and block parsing
Fix parsing
Add parsing of variables
Delete obsolete files
Import some things into the parser
Make token a class, since this isn't 1995
Remove most of the component tree
Remove most dependencies, add dep on trivial-types
Move tokens from parser.lisp to tokens.lisp, create a whole bunch of classes