Merge pull request #62 from gotham-rs/move-from-irc-to-gitter

Update README to reflect move from IRC to Gitter

README.md

@@ -27,10 +27,7 @@ All of the following resources are available to assist you learning Gotham:
 * [Our example application](https://github.com/gotham-rs/example-app)
 
 ## Help
-The Gotham core team collaborate on the [#gotham](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23gotham) channel on irc.mozilla.org. Gotham specific chat and requests for help are both very welcome here.
-
-Additionally the Gotham core team often hang out in
-[#rust-webdev](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-webdev) and [#rust](https://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust).
+The Gotham core team collaborate on [Gitter](https://gitter.im/gotham-rs/gotham). Gotham specific chat and requests for help are both very welcome here.
 
 ## Policies
 Gotham is a young project that we want to create an energetic and respectful community around.