CHANGES IN VERSION 0.99.4

* fixed a bug when setting `cluster_rows` to FALSE but still cluster
  on rows.

CHANGES IN VERSION 0.99.2

* add two examples in vignette
* add chunk labels in the vignette

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CHANGES IN VERSION 0.99.1

* x and y in `cell_fun` are now `unit` objects.

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CHANGES IN VERSION 0.99.0

* First release
