Added tokenizer documentation comment parsing

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>
Added comments lexer grammar

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>
Added comments lexer rule management

Signed-off-by: Grégory PLANCHAT <g.planchat@gmail.com>