Please provide manual installation instructions

[athompso]

If one is not using a Vim plugin manager, the other plugins needed to make use of this can be easily installed manually directly from github. I have not yet been able to figure out how to manually installed vim-yaml-folds (largely due to unfamiliarity with vim plugins, I suspect). Obviously the files go under ~/.vim/pack/ but... where?

[athompso]

Of course I figured it out mere minutes after opening the issue: all the files go into ~/.vim/after/ftplugin. Would you mind documenting that, though?