TypeError in Trimage 1.0.5-1 (Debian Wheezy)

[zang3tsu]

I got this exception while running Trimage on a directory in Debian Wheezy.

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
    self.run()
  File "/usr/share/pyshared/trimage/ThreadPool/ThreadPool.py", line 129, in run
    job.execute()
  File "/usr/share/pyshared/trimage/ThreadPool/ThreadPool.py", line 91, in execute
    logger.warning("A job in the ThreadPool raised an exception: " + excep)
TypeError: cannot concatenate 'str' and 'exceptions.IOError' objects

[Huluti]

Fixed in #56.