Attribute skeleton method for outputting a yaml file instead of csv

[jordansread]

I find it a lot more enjoyable to edit yamls vs csvs. When we've got a very long list of attributes, it would be great to write out the shell to a yaml so I can populate with values.

[jordansread]

It would also be great to tie this function to an optional dictionary file (or data.frame?) that populates definitions of variables if they exist in the dictionary, otherwise includes the normal NA values.