Add gitter.im to the repository and add gitter badge on site and README

[nrobinson2000]

Gitter would allow us developers to communicate more effectively than in the pull request comments.

[nrobinson2000]

We could even put an sidebar chat on the project by using https://github.com/gitterHQ/sidecar

https://sidecar.gitter.im/

[nrobinson2000]

I am adding gitter with this pull request. #27

[benhalpern]

I'm having a hard time with gitter right now and I will need to contact support.

[nrobinson2000]

@benhalpern Have you tried this: https://gitter.im/home/explore#createcommunity

and this: https://github.com/thepracticaldev/1pr/settings/hooks/new?service=gitter

[woubuc]

@benhalpern any progress with Gitter?

[benhalpern]

@woubuc I still haven't figured this out, but can we roll with a room that's not under the org? I made this: https://gitter.im/dev-1pr/1pr

Is that an antipattern?

[nrobinson2000]

I think we could roll with that room for now.