[Open Assets] Social-Links Pack 1.1

Making this update for July, because the racers I made so far are cool enough to be released now.

NEWCOMERS:
* Eikichi Mishina
* Lisa Silverman
* Katsuya Suou
* Fuuka Yamagishi
* Ken Amada
* Shinjiro Agaraki
* Anthro Koromaru

Thanks for supporting this project!