2.4.0

PR for get-tmate.sh and sha256sums are open upstream,
files are form upstream but added *.sha256sums and get-tmate.sh

Easyinstall (Defaults to ./bin, and inc. sha256 verify the download)

$ curl -fsSL https://github.com/MaxPeal/tmate/raw/fork-with-get-tmate.sh/get-tmate.sh -o get-tmate.sh
$ sh get-tmate.sh
$ sh get-tmate.sh -h # get help