Oceansdb

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* Allowing to choose resolution and temporal scale.

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* New generic crop functionality.
* Interpolate in steps, in order: time, lat x lon, and finally z. Gives better results for profiles.

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* Adding CSIRO Atlas of Regional Seas (CARS), another climatology for temperature and salinity.

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* Added etopo5, a world wide bathymetry. Some of this code has its origins on pyAVISO and CoTeDe.

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* Renamed package to OceansDB, planning to include other climatologies and references.

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* Generalized interpolator. Extract climatology for point, profile or section.