hnetcdf-0.3.0.0: CHANGELOG.markdown

0.3.0.0
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* Breaking change: fix problem with hmatrix API -- replace
  `HRowMajorMatrix` and `HColumnMajorMatrix` with single `HMatrix`
  type and manage data ordering internally.

0.2.1.0
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* Update to work with hmatrix 0.16

0.2.0.0
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* Add partial output API