Update morph.styleOf

Get rid of the `styledThrough` conf param - we allow styles on all
levels of a morphological postag definition now.
Change formatting of colorMaps

Allows to nest them, so that a plugin can define several different
colorizing attributes.
Update relation.colorMap
Fix color legends in helpPanel
Update morph.colorMap

This also serves as a full legend now!
Update morph attribute sets
Merge pull request #500 from latin-language-toolkit/complex_colors

Complex colorizer styles - full legends