fork it!
./install.sh
sudo cp -av ./path_to_theme /usr/share/plank/themes/
by yelianfg at: http://yelianfg.deviantart.com/art/eLight-plank-theme-335635701
by CassidyJames at: http://cassidyjames.deviantart.com/art/Glass-Pill-theme-for-Plank-217294064
by robotswillkillyou at: http://robotswillkillyou.deviantart.com/art/translucent-Panel-for-plank-dock-yosemite-like-483065945
by me4oslav at: http://www.deviantart.com/art/Numix-theme-for-Plank-393957556
by pmem at: http://pmem.deviantart.com/art/Wingy-2-a-plank-theme-523851513