Tool to re-chunk data cubes

[forman]

Some scientific data cube analyses require processing of spatial regions at a given time, some other may require time-series data at given location.

The netCDF4 chunk sizes have an important impact on the data reading performance.

A tool that converts one data cube into another with same content but different chunk sizes would be very beneficial for a number of I/O-intense, expensive data analyses, e.g. global time-series processing.