Lisaac prototype interface

Section Header
+ name := SIGNED_INTEGER;
- comment := "Generic Signed Integer.";
Section Insert
- parent_integer:INTEGER :=
Section Public
- append_in buffer:STRING <-
Append in the `buffer' the equivalent of `to_string'. No new STRING
creation during the process.
- to_octal:SELF <-
Gives coresponding octal value.
Hashing:
- hash_code:INTEGER <-
Bound test
- bound_test low:INTEGER_64 to up:UINTEGER_64 :BOOLEAN <-