Include a labels file to add labels quickly.
This loads a file of labels. It partially compensates for a slow parser; it also reduces the size of include files significantly.
The file format is a list of label definitions, in the form [label name length (in characters)][label name][page (ushort)][value (ushort)].
For example, the label fish, value $1234, would be:
.db 4, "fish", $34, $12, $00, $00.