sci-biology/discrover: version bump; add to RDEPEND

Bump ebuild for new release.
When the USE flag "logo" is used, we also need to depend on texlive-latexextra for the standalone package.

Package-Manager: portage-2.2.14
Merge pull request #302 from maaskola/sci-biology/discrover

sci-biology/discrover: version bump; add to RDEPEND