Add skin link to the youtube description

If user has a skin set, add skin to description 

assuming skin is from git.sulej.net
ex. `https://git.sulej.net/Arlind/skins/media/tag/v1.11.0/export/-%20Barely%20still%20Jace/Barely%20still%20Jace%20(Arlind%20edit).osk`

make the skin link `https://git.sulej.net/Arlind/skins/src/tag/v1.11.0/`

In combination with https://github.com/ibuergis/oscbot/issues/26