[COMMIT][PDB] Condition breakpoint & watchpoints.

[Daniel Grunblatt]

I just added condition breakpoints and watchpoints, now you can do:

(pdb) b 4 if S14 <= "parrot"

See docs/debugger.pod for details.

Is it worst to allow something like this?:

if (((S14 == I0) && (I4 <= N3) && (N3 < 4.5 < N7)) || (I5 == 32))

Daniel Grunblatt.