* Improve GitHub logo (1)
Fix Octocat’s tentacle - not quite thick enough.
Minimal geometry changes made with ‘Yqnn/svg-path-editor’, no change in file size.
* Improve GitHub logo (2)
Correct background colour to better match official brand mark.
* Improve GitHub logo (3)
Re-generate reference PNG image for comparison.
* Improve GitHub logo (4)
Update the Android VectorDrawable.
Edited by hand, with new values from SVG.
