Added functionality to jcvi.graphics.choromosome to generate an HTML imagemap (user specifies a window size for each rectangular map area). Also allows user control of image `width x height` and `dpi`.
Added functionality to jcvi.graphics.choromosome to generate an HTML
imagemap (user specifies a window size for each rectangular map area).
Also allows user control of image `width x height` and `dpi`.

tanghaibao/jcvi,sgordon007/jcvi_062915