import p5-Template-Plugin-YAML from 8.2 branch
Revert "import p5-Template-Plugin-YAML from 8.2 branch"

This reverts commit ec153b67317678c3c87f72a56005f466eff69b3a.
re-import p5-Template-Plugin-YAML from 8.2 branch
Merge pull request #264 from reallyenglish/10.0@tomoyukis

import p5-Template-Plugin-YAML from 8.2 branch