Debian bartholomea / TANGLU is not supported

[arohrmann]

I got on an Debian Distro TANGLU this error:

Your distribution, identified as "bartholomea", is not currently supported, please contact NodeSource at https://github.com/nodesource/distributions/issues if you think this is incorrect or would like your distribution to be considered for support

[retrohacker]

@arohrmann could you please take a look at https://github.com/nodesource/distributions/blob/master/deb/setup#L76-L82 ? Modifying this with the appropriate mapping of Tanglu Bartholomea to Debian should solve your problem. If you can confirm and submit a PR against this file with the fix it would be appreciated! We, unfortunately, do not have the resources necessary to do all of these mappings, so we rely on community members such as yourself to get support on your favorite distributions!

[retrohacker]

Converting this to a PR against the README.md containing a list of requested distributions.

#308