Exception syntax not py3 compatable

[lstephen]

Traceback (most recent call last):
  File "/usr/local/bin/construi", line 11, in <module>
    load_entry_point('construi==1.0.0rc1', 'console_scripts', 'construi')()
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 570, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2751, in load_entry_point
    return ep.load()
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2405, in load
    return self.resolve()
  File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 2411, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/local/lib/python3.6/site-packages/construi/cli.py", line 44
    except NoSuchTargetException, e: