Updated Contributing file

Author: Rui Peres

CONTRIBUTING.md

@@ -10,14 +10,13 @@ being reported, please open a pull request instead of an issue. Pull requests ar
 patches or inline code blocks for discussing and merging the changes.
 
 If you can't make the change yourself, please open an issue after making sure
-that one isn't already logged.
+that one isn't already logged. We are also happy to help you in our Slack room (ping [@ReactiveCocoa](https://twitter.com/ReactiveCocoa) for an invitation).
 
 ## Contributing Code
 
 Fork this repository, make it awesomer (preferably in a branch named for the
 topic), send a pull request!
 
-All code contributions should match our [coding
-conventions](https://github.com/github/objective-c-conventions).
+All code contributions should match our coding conventions ([Objective-c](https://github.com/github/objective-c-conventions) and [Swift](https://github.com/github/swift-style-guide)). If your particular case is not described in the coding convention, check the ReactiveCocoa codebase.
 
 Thanks for contributing! :boom::camel: