bugfix: `pwnlib.util.fiddling.hexdump()` now reports the correct address on the last line.
bugfix: bin/phd now offsets addresses by `skip`.
added `pwnlib.util.fiddling.hexdump_iter()` and made `pwnlib.util.fiddling.hexdump()` a thin wrapper.  bin/phd now uses the iterator variant for better performance.
bin/phd now handles top-level exceptions `KeyboardInterrupt` and `IOError` (which happens when e.g. `phd | less`).
added property `pwnlib.term.text.when` which controls when to output control characters.
added argument "--color" to bin/phd.
improved performance of `pwnlib.util.fiddling.hexdump_iter()`.