Python 3 compatible syntax: print, except, raise, octal numbers; removed Python 2.2 boolean compatibility code in xlib/pydispatch/dispatcher.py
Added "from __future__ import print_function" in all relevant places except xlib
print_function in xlib
Merge pull request #431 from alexanderlukanin13/syntax

Python 3 compatible syntax: print, except, raise, octal numbers; removed...