[antlr-interest] Added ranges, escapes to [a-z] notation in lexer to honey badger

[Terence Parr]

Hi. grab another update. augmented […] in lexer:
a-z is the inclusive range
    escape characters with special meaning: trnbf\'" such as \t
    \uXXXX Unicode character with text digits
    \- is the - character
    \] is the ] character

    Missing final range value gives just first char.
    Inverted ranges give nothing
    Bad escape sequence gives nothing
http://www.antlr.org/wiki/display/ANTLR4/Examples
http://www.antlr.org/depot/antlr4/main/CHANGES.txt

Download here:

http://antlr.org/download/antlr-4.0ea-complete.jar

Ter