Slack channel for glue

[Thomas Robitaille]

Hi everyone,

I've now set up Slack for the glue project:

http://glueviz.slack.com

To join, you will need to get an invitation by entering your email address here:

https://glueviz-slack-invite.herokuapp.com

Feel free to drop by at any point to ask questions and/or get help, or
to discuss possible development on the core glue package or glue
plugins!

Cheers,
Tom