rsenv list lists top level environments available for use
rsenv
rsenv install
rsenv link
rsenv link -r removes a link in the current dir
rsenv show shows environment used by current dir
.env file format:
_RSENV=
anything else is treated as an environment variable assignment
on lsb systems, globally available environments are stored in ~/.config/rsenv/envs/
links are created using either posix softlinks or ntfs symlinks?