Added contributing info.

CONTRIBUTING.md

@@ -0,0 +1,11 @@
+Contributions are welcome.
+
+You can either open a pull request or open an issue if you have an idea.
+
+There are 2 main branches
+- `master` - used for stable releases
+- `develop` - used for active development
+
+Feature branches should be created from the `develop` branch.
+
+Hotfix branches should be created from the `master` branch.

README.md

@@ -12,7 +12,7 @@ This concept is very similar to [Stem](https://github.com/alvinl/stem), however
 
 ## Core
 
-Vapor's core (represented by this repo) provides a very simple automated client. This client uses [node-steam](https://github.com/seishun/node-steam) (extended by [node-steam-groups](https://github.com/scholtzm/node-steam-groups)) to connect to Steam servers.
+Vapor's core (represented by this repo) provides a very simple automated client. This client uses [node-steam](https://github.com/seishun/node-steam) (extended with [node-steam-groups](https://github.com/scholtzm/node-steam-groups)) to connect to Steam servers.
 
 Core represents several key features:
 - easy to update and does not have to be modified by the user