removed extraneous stuff added by leiningen
got initial lexer almost working
got prettyprinting working
fixed bug in lexing operators -- still more bugs in lexer to fix
got more cases working in lexer, still not done...
very close to getting lexer working
lexing working, except it has incorrect column numbers
halfway towards converting to core.match
got version of lex working with core.match
got repl working again
changed partial token in lexer back from string to vector, until it is closed
got column numbers working in lexer
fixed bug in binary operator parsing
edited .gitignore file to exclude .swp and .DS_Store files
added tests for lex function