Sudokuextract

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- Changed the main function of `sudokuextract.extract` to print and
not return anything.

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- Replace ndi.binary_fill_holes with a binary_erosion and increased number of blobs to test to 2.

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- New classifiers.
- New data with additional data of 1:s.

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- Disabled the Corners parsing solution again.
- Warping image now creates a much smaller image to prevent memory issues.
- This also increased speed with a factor of at least 4.
- ``apply_gaussian`` now applies a Gaussian on entire image first.
- Testing can now use a tar-file of images that can be downloaded from the web.
- Also removed lambda functions in favour of ``functools.partial``.

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- Restricted scikit-image version to < 0.12.

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- New classifiers with both SudokuExtract and MNIST data.
- New data.
- MNIST data stored separately from SudokuExtract data.
- Number of Nearest Neighbours increased to 10 due to larger training data.
- Several small bugfixes for new features added in v0.8.0.