Numpy FutureWarning (py36, v0.1.5)

[aplassetter]

Attempting to use czifile within a Jupyter notebook installed via Anaconda and am seeing FutureWarning as so:

/anaconda3/lib/python3.6/site-packages/czifile/czifile.py:400: FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use `arr[tuple(seq)]` instead of `arr[seq]`. In the future this will be interpreted as an array index, `arr[np.array(seq)]`, which will result either in an error or a different result.
  out[index] = tile

Some quick searching seems to be a numpy warning regarding future deprecation.

numpy/numpy#11411

Doesn't seem to be causing issues yet, but thought I would mention it.

[eric-wieser]

Fixed in #5