changes in verison 1.1.7

* add legends by Legend() function in the vignette

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changes in version 1.1.5

* `normalizeToMatrix`: modified default of `trim` to 0
* `makeMatrix`: w0 mode can deal with overlapping signals

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changes in version 1.1.4

* the color of error areas is set 25% light of the color of corresponding line.
* support raster image for heatmap body

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changes in version 1.1.3

* parameter name was wrong when constructin `ht@layout$graphic_fun_list`
* add `row_order` option in `EnrichedHeatmap()`
* `normalizeToMatrix()` supports self-defined smoothing function
* there can be no upstream or/and downstream in the heatmap
* smoothing function can be self-defined

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changes in version 1.1.2

* `normalizeToMatrix()`: more options can be passed to `locfit::locfit()`
* `anno_enrich()`: exclude NA values

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changes in version 1.1.1

* add `getSignalsFromList()` which summarize signals from a list
  of matrix
* export `copyAttr()`

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changes in version 0.99.3

* `anno_enrich`: get rid of lazy loading
* smoothing by locfit

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changes in version 0.99.2

* NULL can be added to the heatmap list

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changes in version 0.99.1

* correctly use `system.file()` now

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changes in version 0.99.0

* first release