duplicate .retriever folders on windows

[ethanwhite]

Moving this issue by @juniperlsimonis over from weecology/retriever#1239 since this appears to only be an issue with R.

there are sometimes that windows machines create a .retriever folder in c:\users<username> as well as c:\users<username>\documents

new installation of the development version from github (pip install git+https://[email protected]/weecology/retriever.git) on my laptop only creates it in c:\users<username>.

the first time i run an rdataretriever::fetch call in R (using R Console), it creates it in c:\users<username>\documents

We've seen this sort of problem before with RStudio doing one thing and R doing another. Thought @juniperlsimonis doesn't use RStudio so it seems like a more general issue with R having variable interpretations of what the users home directory is on Windows. This may also be a difference between what Python reads as the home directory and what R reads as the home directory.