Some tasks that have been mentioned elsewhere that would be nice to have in the debugger:

  * Make breakpoints at labels
  * Handle restart opcodes - ''though I'm not even sure what these opcodes are at this point (--coke)''
  * Attach to a running program
  * Prior art: http://xdebug.org/docs-dbgp.php
  * clone the interpreter to allow people to play into the debugger and then continue the normal execution of the program
  * in PDB_hasinstruction
    * previous comment suggested this SHOULD take the line, get an instruciton, get the opcode for that instruction and check that is the correct one. (implying it doesn't now.)
    * Decide how to deal with macros in here.

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