*** test program for CToken class 
initial state:
(token (type 0) (unknown))
error token:
(token (type 1) (error 1))
number token:
(token (type 4) (number 3.140))
retain count 1
string token:
(token (type 5) (string "Hello, World"))
retain count 1
ident token:
(token (type 3) (ident Hello, World))
retain count 1
rword token:
(token (type 2) (rword 64))
retain count 1
closing output:
num : 3.140000
str : Hello, World
bye
