Updates for Python 3

[joshuaeckroth]

No description provided.

[arikpoz]

It fails on Python 2.7

$ ./run_toolbox.py 
Traceback (most recent call last):
  File "./run_toolbox.py", line 34, in <module>
    main()
  File "./run_toolbox.py", line 24, in main
    lv = LiveVis(settings)
  File "/home/code/deep-visualization-toolbox/live_vis.py", line 54, in __init__
    module = importlib.import_module(module_path)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/code/deep-visualization-toolbox/caffevis/app.py", line 272
    print('pattern(' + pattern_first_mode + ' optimized max)', file=status)
                                                                   ^
SyntaxError: invalid syntax