Compiles an ascii bytecode as produced by disassemble to binary bytecode assembler.
bytecode is a binary file wih either the magic 4 bytes PLBC
at the start, or something like #! /usr/bin/perl\n
use ByteLoader 0.07, typically with the .plc or .pmc extension.
If filename is -, the input is read from STDIN and
you can still provide an output filename.