Include new icon set in MultiMC.

[Zekken01]

Include this new icon theme in MultiMC,
https://i.imgur.com/AGs8F3R.png

https://mega.nz/#!cYtVwaQS!VDmXmOd5z3mjB2OqrGh_4RpU4-S3sGhNE4NZNQFx9SA

[peterix]

Hmmm... the file isn't there anymore.