Version 1.0.8
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Introduced changes by Tauno Metsalu:
* It is now possible to use hclust as an object 
* the display of annotation names can be controlled in more detail now

Version 1.0.7
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Trying to comply with CRAN policies

Version 1.0.6
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Added clustering_callback option to give more control over the hierarchical 
clustering

Version 1.0.5
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Fixed the continuous legend bug

Version 1.0.4
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Make the NA handling in parameters more intelligent

Version 1.0.3
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Make the NA handling more intelligent for annotations

Version 1.0.2
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Trying to comply with CRAN policies

Version 1.0.1
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Fixed small bug with gap calculation

Version 1.0.0
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Major rewrite of pheatmap.

* Internally pheatmap uses now gtable package and returns the gtable object that
 gives more flexibility in editing the figure or combining it with other plots
* Introduced the opportunity to separate parts of heatmap using gaps. This can 
be achieved using gaps_col and gaps_row parameter when the corresponding 
dimension is not clustered. Alternatively cutree_row and cutree_col introduce 
the gaps based on the clustering.
* Now it is possible to annotate rows of heatmaps in similar manner as it was 
possible with columns before.
* Now it is possible to supply custom labels for rows and columns. 
* Added names to annotation tracks
* Improved the overall appearance of the plot, concentrating on legends and 
annotation color schemes

Version 0.7.10
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Can set color to the values shown inside the cells. 

Version 0.7.9
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Added option to show arbitrary values within cells, by giving a matrix to 
display_numbers parameter.

Version 0.7.8
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Made the dendrogram drawing faster

Version 0.7.7
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Fixed a bug related to calculating space for the column and row names. Made the
documentation more readable

Added .Rbuildignore

Version 0.7.6
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Fixed a bug, where the color scales for scaled matrices were not centered to 0.

Version 0.7.5
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Minor bug fix

Version 0.7.4
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Minor bug fixes

Version 0.7.2 and 0.7.3
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Fixed some bugs introduced by changing the direction of plotting the y axis


Version 0.7.1
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* Added option to modify labels of the color scale legend (legend_breaks and
legend_labels)
* Changed the direction of plotting to start from the top instead of bottom on 
y axis.


Version 0.7
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* Added opportunity to show also the corresponding numeric values in the cells 
(see display_numbers parameter).
* Added opportunity to show unused factor levels for column annotations in the 
legend (drop_levels parameter). 
* Changed the order how the rows are drawn when rows are not clustered. Before 
it started from the bottom, now from the top.
* Changed legend positioning according to the presence of column names
* The function now returns invisibly all the clusterings that it performed. 