ID 5: Lookup tables
Optional list of Lookup table (substitution) entries. If you are not using lookup tables, return an empty list.
A number between 0 and 31
a number between 0 and 4095 relative to the current table
A string of printable characters. Can be any printable character except ',' (this restriction will probably be removed by full release)
For optimal performance and resource usage:
The table numbers should be consecutive and start at 0. Likewise, the indexes for each table should be consecutive and start at 0.