ValueException should be ValueError

[jgosmann]

When trying to redefine a parameter:

Traceback (most recent call last):
  File "/home/jgosmann/.pyenv/versions/3.5.3/bin/pytry", line 11, in <module>
    sys.exit(run())
  File "/home/jgosmann/.pyenv/versions/3.5.3/lib/python3.5/site-packages/pytry/cmdline.py", line 35, in run
    t = trials[0]()
  File "/home/jgosmann/.pyenv/versions/3.5.3/lib/python3.5/site-packages/pytry/trial.py", line 21, in __init__
    self.params()
  File "imem/models/neural_tcm.py", line 38, in params
    self.param("save debug data", debug=False)
  File "/home/jgosmann/.pyenv/versions/3.5.3/lib/python3.5/site-packages/pytry/trial.py", line 36, in param
    raise ValueException('Cannot redefine parameter "%s"' % k)
NameError: name 'ValueException' is not defined

[tcstewar]

That's been fixed since 2d57ade

I haven't done a release since then though....