remove unused token defs in simple parser 1; add note from Java spec about allowable multilingual characters in identifier names
clean up some problems in full token definition

 - spacing
 - note on java spec belongs elsewhere
 - add '@' and '...' tokens
new Token definitions, extended to include floating point literals and base-2/8/16 integer literals; add note about octal escapes
full tokenizer:  add binary, octal, and hex integer literals
add @ and ... tokens to parser, noting that ... should be tried before . to get the longest match
add octal escapes to string and character literals; add code for converting octal escapes to characters