Pims

This is a hotfix release to adjust to a change in our dependency, six, that made the library un-importable in Python 2. There are no other changes.

This release adds compatibility with Mac OSX!

Additionally, the timestamp field is now read correctly on all platforms.

- Fix compatibility with Pillow v3.0.0 (PR 204)
- API: plot_to_frame and plots_to_frame now take fig_size_inches and bbox_inches as keyword arguments instead of passing on all keyword arguments to imsave (PR 206)
- Fix zipfile handling in Py3 (PR 199)
- Fix CINE reader for Py2 (PR 219)
- Support non-monochrome and packed-bits images in NorpixSeq (PR 218)
- Update documentation
- Update slicerator dependency to v0.9.7 (fixes pipeline nesting)
- Update bioformats version to v5.1.7 (PR 224)

This is a simple maintenance release, introducing no functionality changes. The packaging and installation are simplified by adopting [tifffile](https://pypi.python.org/pypi/tifffile) as a dependency rather than directly including the source PIMS.

Henceforth, to install PIMS on any platform, we recommend `conda install -c soft-matter pims`, but `pip install pims` is also supported.

Minor release of PIMS
- Use [PyAV](http://mikeboers.github.io/PyAV/) for handling video files
- Ships with Christoph Gohlke's tifffile
- Added support for .cine files
- Added prototype of universal `open` function which tries to guess the correct class to use to handle a given file based on the extension
- Added ability to create an ImageSequence from a list of paths