Repurpose

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- Use joblib for parallel processing framework, improved logging
- Added option to parallelize Img2Ts process
- Fix bug where a wrong grid attribute was used.

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- Ts2Img module was rebuilt. Allows conversion of time series with NN lookup.
- Added example notebook for converting ASCAT time series into regularly gridded images.
- Added a simple parallelization framework, with logging and error handling.
- Added the option to pass custom pre- and post-processing functions to ts2img.

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- Update for new pyscaffold
- Fixed bug where resampling failed when a BasicGrid was passed instead of a CellGrid

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- Update pyscaffold package structure (pyscaffold 3)
- Drop py2 support
- Add pypi deployment to travis.

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- Add resample functions (from pytesmo)

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- Update setup.cfg