add key with colors and names of protein ffeatures

[pnrobinson]

For each unique feature name, use the same color. If the name is more than 5 characters, use an abbreviation (e.g., "A", "B", etc...) in the main protein figure.
Add a legend with one row per feature that shows a color box, the abbreviation if any, and the full name

Do the same for the variant class lollipops

[frehburg]

New params:

• labeling_method: either enumerate (A, B, C, ...) or abbreviate (first 5 chars) the feature name. Figure resizes accordingly
• legend_x: move the legend around, by default right of figure to not overlap with the variant markers

[pnrobinson]

Looks great! Wow!
PS -- vielleicht so was Ähnliches für die Lollipops?

[pnrobinson]

@frehburg
Please add adjust the title of the graphic.
Protein name should come from protein_meta.label (and not be the accession number). Also please remove "Working title"!

[ielis]

I fixed the title and added the protein name, the updated code is already in develop.

The rest of this issue is, however, most likely still current.

[pnrobinson]

redundant with #124
closing