print_raw function for writing bytes out on Python 3

Often people print bytes out and it looks ugly in Python 3.

Convert something like this to handle raw writing in Python 3 and with a file= argument for multiple streams. Can fallback to regular print in Python 2.
```
def print_raw(bytes):
"""Print bytes, preserving binary chars for color/CURSES/etc on command line."""
sys.stdout.buffer.write(bytes)
```