Changes in version 1.99.0                        

    o   Add a hilbert curve legend showing the orientation of the curve.

                       Changes in version 1.29.1                        

    o   add `hc_which()`.

                       Changes in version 1.21.1                        

    o   add "max_freq" method for mean_mode so that in each interval, value corresponded to
	the maximal frequency is selected.

                       Changes in version 1.13.3                        

    o   set `interpolate = FALSE` in `grid.raster()`

    o   improved `hc_map()`

                       Changes in version 1.13.2                        

    o   fixed warnings in Rd files

                       Changes in version 1.13.1                        

    o   update with new definition of legends

                       Changes in version 1.11.1                        

    o   move IRanges and GenomicRanges to imports field in DESCRIPTION

                        Changes in version 1.5.2                        

    o   `hc_map` supports to add labels under pixel mode 

                        Changes in version 1.1.6                        

    o   change format of NEWS

                        Changes in version 1.1.5                        

    o   use new version of testthat

                        Changes in version 1.1.4                        

    o   add citation

                        Changes in version 1.1.3                        

    o   revised vignette

                        Changes in version 1.1.2                        

    o   add examples in vignette

    o   add `hc_polygon()`

    o   `hc_map()`: support borders

    o   `HilbertCurve()`: start position can be selected, also the orientation
	of the first segment can be selected

                        Changes in version 1.1.1                        

    o   add functions specific for genomic data visualization

                       Changes in version 0.99.3                        

    o   transparency is also averaged

                       Changes in version 0.99.2                        

    o   jump to top viewport for each low-level functions

                       Changes in version 0.99.1                        

    o   add dependency to base packages

                       Changes in version 0.99.0                        

    o   new release