read_mesh_file: Download and parse an ASCII MeSH File
In hrbrmstr/whatamesh: Tools to Work with ASCII MeSH Files

If the string passed in matches a local filename it will be read in locally, otherwise it will be downloaded. NOTE: large files take a while.

1	read_mesh_file(fil, wide = FALSE)

`fil`	filename of a local ('.bin') ASCII MeSH file to parse or downlaod and parse. 'fil' will be checked to see if it exists locally and if not the 'nlmpubs.nlm.nih.gov' prefix FTP URL will be added to the file and the file will be read into memory before parsing.
`wide`	if 'TRUE' then the repeating column names will be made unique and spread out into a wide data frame; otherwise a data frame with nested columns will be returned.